description

asymmetric rod seal for standard applications. interference fit on outside diameter maintains stable fit in the housing. design provides ultimate sealing effect over a

wide temperatur range and good backpumping ability. also used as secondary seal in combination  with PTFE-seal type RS08.

 

 

 

 

 

  • asymmetric single-acting rod lipseals, with the dynamic sealing lip being shorter than the static one.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • suitable for long travel.
  • little inclination to“stick-slip”.
  • low break-away load after prolonged periods of standstill.

 

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS 0 1 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods and fittings.
  • rod for applications seals with small extrusion gap and without special impact load.
  • if composite seals on PTFE basis are used,this rod seal can be used as a secondary seal.
  • can also be used as a pivot seal at low loads.

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too large.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).

 

function

RS 0 1 profiles are lip seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the seal- ing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geom- etry in the software program

sealing element temperature(°C) max. surface speed max. pressure hydrolysis dry running wear resistance
 PU -30  ... +110 0,5 m/s 400 bar (40 MPa) - + ++
 HPU -20  ... +125 0,5 m/s 400 bar (40 MPa) ++ + ++
 LTPU -50 ... +110 0,5 m/s 400 bar (40 MPa) - + ++
 SPU -20  ... +110 0,7 m/s 400 bar (40 MPa) ++ ++ ++
CPU -30  ... +110 0,5 m/s 400 bar (40 MPa) ++ + ++

 

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

 

gap dimension:

 operating pressure  cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
 safe extrusion gap (mm)
100 bar (10 MPa) 0.18 0.22 0.32 0.38 0.45 0.53
200 bar (20 MPa) 0.12 0.16 0.25 0.33  0.40 0.45
300 bar (30 MPa) 0.07 0.13 0.21 0.28 0.36 0.42
400 bar (40 MPa) 0.05 0.10 0.19 0.26 0.33 0.39

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the table applies to an operating temperature  of 70 °C.

use larger cross sections to increase maximum allowed gap dimension. if the permissible extrusion gap cannot be achieved, RS 01  is to be used.

 

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25mm or more, and dependant  on radial cross section (cs), seals may be snapped into closed housings.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

 

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

secondary seal

≤ 100 H10 H8 H8 H8
> 100 ≤ 200 H10 H8 H7 H8
>200 H9 H8 H7 H8

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 ød + 8 6.3 4
25 ~ 49,9 ød + 10 8 5
50 ~ 149,9 ød + 15 10 7.5
150 ~ 299,9 ød + 20 14 10
300 ~ 499,9 ød + 25 17 12.5
500 ~ 699,9 ød + 30 25 15
700 ~ 1000 ød + 40 32 20
> 1000 ød + 40 32 20

 

 fitted

 

 

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

 

www.jetseal-pars.com

 

Function

Rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere, preventing leakage and pollution of the environment.

 

 

 

 

 

Features

  • Asymmetrical, single acting rod seal, designed with interference on the OD which provides a good static fit in the groove.
  •  Wider groove and softer lips compared to RS01.
  •  Dynamic sealing lip shorter than static lip to avoid drag pressure.
  •  Excellent static and dynamic sealing performance.
  •  Useable for long stroke lengths.
  •   Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

 

Application

Reciprocation rods in hydraulic cylinders, plungers where low friction is required Universal rod seal for small extrusion gaps and minor load impacts.

Also used as secondary seal in combination with RS09 (PTFE + O-Ring energizer). Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation.


 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

 

 

Function

Rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere, preventing leakage and pollution of the environment.

 

 

 

 

Features

  •   Asymmetrical, single acting rod seal, designed with interference on the OD which provides a good static fit in the groove.
  •   Wider groove and softer lips compared to RS01.
  •   Dynamic sealing lip shorter than static lip to avoid drag pressure.
  •   Excellent static and dynamic sealing performance.
  •   Useable for long stroke lengths.
  •   Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

 

Application

Reciprocation rods in hydraulic cylinders, plungers where low friction is required Universal rod seal for small extrusion gaps and minor load impacts.

Also used as secondary seal in combination with RS09 (PTFE + O-Ring energizer). Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation.


 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

 

 

Function

Rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

 

 

 

Features

  •  Asymmetrical, single acting rod seal for hydraulic applications, designed with interference on the OD which provides a good static fit in the groove.
  •  Shortened sealing lip decreases contact area to the sealing surface thus resulting in reduced friction.
  •  Use in applications with lubricated air is possible.
  •  Small and compact housings possible.
  •  Useable for long stroke lengths.
  •  Negligible tendency to “stick-slip”, small break-away loads after long standstill.

 

Application

Reciprocating pistons in hydraulic cylinders

Universal riston seal for small extrusion gaps and minor load impacts. Max. pressure 400bar, max. speed 0,5 m/s.

 

Installation

Snap-in installation.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

www.jetseal-pars.com

 

description

asymmetric rod seal for standard applications as RS01 , but due to design with active back-up ring suitable for larger extrusion gaps or higher pressure range. RS 02 for short housings.

 

 

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shorter than the static one.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • the active back up ring on the trailing side of the seal reduces extrusion wear and
  • allows larger gap dimensions resp higher system pressure.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 700 bar as a seal between pressurized space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • suitable for long travel.
  • little inclination to“stick-slip”.
  • low break-awayload after prolonged periods of standstill.
  • shorter seal heights design RS 02

 

application

 

not bolded symbols; please consult our technical for application limitations

 

 

 

category of profile

machined only.

 

single acting

the RS 02  seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • rod seals for applications with large extrusion gap and without specific impact load.

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too big.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • recovery volume  is limited.
  • design RS 02 with triangular backupring can lead to installation difficulties.

 

function

RS 02 profiles are lip seals designed to seal pressurized space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

 

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

as the temperature limits are determined by POM, using special materials  for the back up ring can expand the temperature limits.

 

 

gap dimension

 operating pressure  cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
 safe extrusion gap (mm)
100 bar (10 MPa) 0.80 1.00 1.50 1.50 1.50 1.50
200 bar (20 MPa) 0.60 0.70 1.00 1.10 1.25 1.50
300 bar (30 MPa) 0.40 0.50 0.75 0.75 0.80 1.00
400 bar (40 MPa) 0.30 0.30 0.50 0.50 0.60 0.75
600 bar (60 MPa) 0.20 0.25 0.30 0.30 0.30 0.30
700 bar (70 MPa) 0.10 0.12 0.13 0.14 0.15 0.16

 

surface quality                          

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

 tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

for inside diameters of 25 mm or more, and dependant  on radial cross section (cs), the seals may be snapped into the housing.

 

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

secondary seal

≤ 100 H10 H8 H8 H8
> 100 ≤ 200 H10 H8 H7 H8
>200 H9 H8 H7 H8

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see jet seal pars  catalog...

 

 

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 ød + 8 6.3 4
25 ~ 49,9 ød + 10 8 5
50 ~ 149,9 ød + 15 10 7.5
150 ~ 299,9 ød + 20 14 10
300 ~ 499,9 ød + 25 17 12.5
500 ~ 699,9 ød + 30 25 15
700 ~ 1000 ød + 40 32 20
> 1000 ød + 40 32 20

 

above recommendations refer only to design RS02.

if for same cross-section a smaller height is used the design RS02-A could be necessary.

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

 

www.jetseal-pars.com

description

asymmetric rod seal for standard applications as RS01 but due to design with active back-up ring suitable for larger extrusion gaps or higher pressure range.

 

 

 

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shorter than the static one.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • the active back up ring on the trailing side of the seal reduces extrusion wear and
  • allows larger gap dimensions resp higher system pressure.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 700 bar as a seal between pressurized space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • suitable for long travel.
  • little inclination to“stick-slip”.
  • low break-awayload after prolonged periods of standstill.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

 category of profile

machined only.

 

single acting

the RS02-A seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • rod seals for applications with large extrusion gap and without specific impact load.

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too big.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • recovery volume  is limited.

 

function

RS02-A profiles are lip seals designed to seal pressurized space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

 

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

as the temperature limits are determined by POM, using special materials  for the back up ring can expand the temperature limits.

 

 

gap dimension

 operating pressure  cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
 safe extrusion gap (mm)
100 bar (10 MPa) 0.80 1.00 1.50 1.50 1.50 1.50
200 bar (20 MPa) 0.60 0.70 1.00 1.10 1.25 1.50
300 bar (30 MPa) 0.40 0.50 0.75 0.75 0.80 1.00
400 bar (40 MPa) 0.30 0.30 0.50 0.50 0.60 0.75
600 bar (60 MPa) 0.20 0.25 0.30 0.30 0.30 0.30
700 bar (70 MPa) 0.10 0.12 0.13 0.14 0.15 0.16

 

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

for inside diameters of 25 mm or more, and dependant  on radial cross section (cs), the seals may be snapped into the housing.

 

recommended mounting space:

 

 

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰ ... 20⁰ α = 20⁰ ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 ød + 8 6.3 4
25 ~ 49,9 ød + 10 8 5
50 ~ 149,9 ød + 15 10 7.5
150 ~ 299,9 ød + 20 14 10
300 ~ 499,9 ød + 25 17 12.5
500 ~ 699,9 ød + 30 25 15
700 ~ 1000 ød + 40 32 20
> 1000 ød + 40 32 20

 

fitted:

 

 

 

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

 

www.jetseal-pars.com

 

Function

Rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere, preventing leakage and pollution of the environment.

 

 

 

 

 

Features

  •  Asymmetrical, single acting rod seal, designed with interference on the OD which provides a good static fit in the groove.
  •  Dynamic sealing lip shorter than static lip to avoid drag pressure.
  • Improved sealing performance in pressureless condition because of the glide ring on the ID
  • Excellent static and dynamic sealing performance.
  • Useable for long stroke lengths.
  • Negligible tendency to “stick-slip”
  • Activated back-up rings prevent and reduce gap extrusion.

 

Application

Reciprocation rods in hydraulic cylinders, plungers.

Universal rod seal for larger extrusion gaps and higher load impacts.

Max. pressure 700 bar, max. speed 0.5 m/s, depending on material selection.

 

Installation

Snap-in installation.

  

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

www.jetseal-pars.com

description

asymmetric rod seal, for special housings (DIN/ISO 7425 part 2) and for the use as a primary rod seal in sealing system. due to design with active back-up ring suitable for high pressure peaks or larger extrusion gaps.

 

two-piece RS 02-C seal set for use as a primary  rod seal. the S02-S seal set is always used in a sealing system in combination with U-ring.

 

 

 

 

application

 

 

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS 02-C seal is designed for use as a rod seal.

 

area of application: hydraulics

earth moving equipment, agricultural machinery, injection moulding machines, industrial vehicles, cranes, standard cylinders.

 

advantages

the Jet Seal Pars U-Ring Syprim RS 02-C is designed  especially for use as a system seal

  • short primary seal.
  • no pressure enclosed between primary and secondary seal.
  • low friction.
  • highly wear-resistant.
  • protection against extrusion through activated back-up ring.

 

 

gap dimension

the decisive factor for the function of the seal is the largest gap dimension occurring during operation on the non-pressurised side of the seal.

 operating pressure  cs = (ØD - Ød)/2 mm
4 5
 safe extrusion gap (mm)
100 bar (10 MPa) 0.80 1.00
200 bar (20 MPa) 0.60 0.70
300 bar (30 MPa) 0.40 0.50
400 bar (40 MPa) 0.30 0.30

 

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

fitting & installation

careful fitting is a prerequisite  for the correct function of the seal.

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 

 

 

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

 

www.jetseal-pars.com

 

description

O-Ring activated, asymmetrical rod seal. interference fit on outside diameter maintains stable fit in the housing. design provides ultimate sealing effect. especially suitable for short stroke applications (e.g. spindle seals, couplingactuators…).

 

 

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shorter than the static one. in addition, an O-ring inserted into the groove increases the preload.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphere.
  • good sealing in all pressure ranges.
  • excellent static and dynamic sealing
  • suitable for short travel.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  the direction  is changed).
  • recommended when holding or positioning under pressure. 

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS03 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g.clutch operation).
  • as rod seals for clamping functions.
  • when an appropriate preload element is used,also suitable for low temperatures (down to -50°C).

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too large.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high degree of friction.
  • high break-awaymoment.
  • the recovery volume  is smaller than with simple lip seals.
  • cross-section limited to 20 mm.

 

function

RS03 profiles are lip seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the designis based on application in standard hydraulic systems with conventional  hydraulic oils. the operating  parameters are as defined in thesealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

other materials such as Viton, Silicone, EPDM, H-NBR, etc., can be used for the preload element, but they are only useful in specific cases (temperature or

chemical influences).

 

gap dimension

 operating pressure  cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
 safe extrusion gap (mm)
100 bar (10 MPa) 0.18 0.22 0.32 0.40 0.45 0.55
200 bar (20 MPa) 0.12 0.15 0.25 0.33 0.40 0.45
300 bar (30 MPa) 0.07 0.12 0.22 0.30 0.37 0.42
400 bar (40 MPa) 0.05 0.10 0.18 0.25 0.34 0.40

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

 

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

secondary seal

≤ 100 H10 H8 H8 H8
> 100 ≤ 200 H10 H8 H7 H8
>200 H9 H8 H7 H8

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

 

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 ød + 8 6.3 4
25 ~ 49,9 ød + 10 8 5
50 ~ 149,9 ød + 15 10 7.5
150 ~ 299,9 ød + 20 14 10
300 ~ 499,9 ød + 25 17 12.5
500 ~ 699,9 ød + 30 25 15
700 ~ 1000 ød + 40 32 20
> 1000 ød + 40 32 20

 

fitted:

 

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

www.jetseal-pars.com

 

 

 


description

O-Ring activated, asymmetrical PTFE rod seal, low friction, good dry running proper- ties and adaptation possibilities for diverse temperatures and media by selection of suitable O-Ring material, almost no dead spots as required for applications in food & pharma industry.

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shorter than the static one. an O-ring inserted in the groove creates the preload.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • good sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 200 bar as a seal between pressurised space and atmosphere

(in certain cases even above, see “gap dimensions”).

  • good sealing in all pressure ranges.
  • excellent static and dynamic sealing after short run-in time.
  • suitable for short and long travel.
  • small break-awayload.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  the direction is changed).
  • little friction when dry running or when used in media with poor lubrication

(conditionally suitable for use in aqueous media).

  

application

 

not bolded symbols; please consult our technical for application limitations

category of profile

machined only.

 

single acting

the RS03-F seal is designed  for use as a rod seal.

 

application range

  • reciprocating and swiveling rods on cylinders,push rods, fittings in the chemical industry.

 note

  • considering the limited long-time rupture strength of the PTFE materials, the ratio of cs/H should not fall below a value of 1/1.5. using back up rings can widen the application range.
  • cross-sections limited with 15 mm.
  • varying the angle of the chamfer on the dynamic sealing lip allows adaptation to media (steeper angle for high viscosity media)
  • respectively a pressure relief (flat angle).

 

function

RS03-F profiles are lip seals designed  to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in aggressive media or with high thermal demands. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

other materials such as Viton, Silicone, EPDM, H-NBR, etc., can be used for the preload element, but they are only useful in specific cases (temperature or

chemical influences).

  

gap dimension

the decisive factor for the function of the seal is the largest gap dimension  occurring during operation  on the non-pressurised side of the seal.

 operating pressure  cs = (ØD - Ød)/2 mm
4 5 7.5 10 ≤
 safe extrusion gap (mm)
50 bar (5 MPa) 0.30 0.30 0.55 0.65
100 bar (10 MPa) 0.25 0.25 0.40 0.50
150 bar (15 MPa) 0.20 0.22 0.35 0.45
200 bar (20 MPa) 0.15 0.20 0.30 0.40

 important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the table refers to a operating temperature of 80°C. temperatures below may increase the safe extrusion gap slightly, at temperatures above 80 °C, the gap dimensions has to be reduced or a stronger profile selected.

in exceptional cases, a pressure above the limit of 200 bar is possible, the safe extrusion gap is the result of the tolerance pair H8/f8, influences due to thermal expansion have to be considered. we also recommend contacting our our technical department.

  

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2.0 ≤0,05-0,3
bottom of groove ≤10 ≤1,6
groove face ≤10 ≤1,6

 

tolerance recommendation

seal housing tolerances
Ød h10
ØD H9

 

mode of installation

Ød type of installation
≤ 30•cs open mounting space required
> 30•cs snap mounting possible

 

normally, an open mounting space is to be provided. the profile snaps into simple grooves, if the diameter/cross-section  ratio is big enough. a special groove design is, however, required (please contact our technical department).

 

recommended mounting space:

 

 

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

secondary seal

≤ 100 H10 H8 H8 H8
> 100 ≤ 200 H10 H8 H7 H8
>200 H9 H8 H7 H8

 insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

 

 

 

 

with PTFE materials, the profile size does not depend so much on the seal diameter but rather on pressure and extrusion gap. this relationship is described under “gap dimensions”. nominal widths not shown in the diagram can be interpolated.

the ratio between nominal width and seal height cs/H should not drop below 1/1.5. therefore we recommend the following housing heights.

 

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 ød + 8 6.3 4
25 ~ 49,9 ød + 10 8 5
50 ~ 149,9 ød + 15 10 7.5
150 ~ 299,9 ød + 20 14 10
300 ~ 499,9 ød + 25 17 12.5
500 ~ 699,9 ød + 30 25 15
700 ~ 1000 ød + 40 32 20
> 1000 ød + 40 32 20

 

fitted:

 

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

www.jetseal-pars.com

 

 

Description

asymmetric rod seal for standard applications as RS04, but due to design with active back-up ring suitable for larger extrusion gaps or higher pressure range. RS04 for short housings.

 

 

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shorter than the static one. In addition, an O-ring inserted into the groove increases the preload.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • the active back up ring on the trailing side of the seal reduces extrusion wear,thereby making larger gap dimensions possible resphigher system pressure.
  • for pressures up to 700 bar as a seal between pressurised space and atmosphere.
  • good sealing in low pressure ranges.
  • excellent static and dynamic sealing.
  • suitable for short travel.
  • recommended when holding or positioning under pressure.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  thedirection is changed).

 

application

 

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS04 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g.clutch operation).
  • as rod seals for clamping functions.

 note

  • only when mounted, does this seal have the correct functioning dimension. when slipping the seal over the piston rod, it may appear too big.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high degree of friction.
  • high break-awaymoment.
  • the recovery volume  is smaller than with simple lip seals.
  • cross-section limited to 20 mm.

 

function

RS04 profiles are lip seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 operating parameters & material

 

sealing element energizer back-up ring temperature°C max-surface speed max-pressure hydrolysis dry running wear resistance
 PU  NBR (70 shore A)   POM / PA   -30 °C ... +100  0,5 m/s 700 bar (70 MPa) - + +
 HPU NBR (70 shore A) POM / PA -20 °C ... +100 0,5 m/s 700 bar (70 MPa) - + +
 LTPU NBR (70 shore A) POM / PA -30 °C ... +100  0,5 m/s 700 bar (70 MPa) - + +
 SPU NBR (70 shore A)  POM / PA -20 °C ... +100 0,7 m/s 700 bar (70 MPa) - + +
CPU NBR (70 shore A)  POM / PA -30 °C ... +100 0,5 m/s 700 bar (70 MPa) - + +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                            - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

materials such as Viton, Silicone, EPDM, H-NBR, etc. can also be used for the preload element, but they are only useful in specific cases (temperature or

chemical influences). the temperature limits are also determined by the supporting element; using special material can expand the temperature range.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
100 bar (10 MPa) 0.80 1.00 1.50 1.80 2.10 2.20
200 bar (20 MPa) 0.60 0.70 1.00 1.20 1.30 1.50
300 bar (30 MPa) 0.40 0.5 0.70 0.75 0.80 1.25
400 bar (40 MPa) 0.25 0.30 0.50 0.50 0.60 0.75
600 bar (60 MPa) 0.20 0.25 0.25 0.25 0.25 0.25
700 bar (70 MPa) 0.10 0.12 0.13 0.14 0.15 0.16

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), the seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

recommended guide tolerance D1:

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

  

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 Ød + 8 6.3 4
25 ~ 49,9 Ød + 10 8 5
50 ~ 149,9 Ød + 15 10 7.5
150 ~ 299,9 Ød + 20 14 10
300 ~ 499,9 Ød + 25 17 12.5
500 ~ 699,9 Ød + 30 25 15
700 ~ 1000 Ød + 40 32 20
> 1000 Ød + 40 32 20

above recommendations refer only to design S04-P.

if for same cross-section a smaller height is used the design S04-PD could be necessary.

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

description

asymmetric rod seal for standard applications as RS04-A, but due to design with active back-up ring suitable for larger extrusion gaps or higher pressure range.

 

 

 

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shorter than the static one. in addition, an O-ring inserted into the groove increases the preload.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • the active back up ring on the trailing side of the seal reduces extrusion wear,
  • thereby making larger gap dimensions possible resphigher system pressure.
  • for pressures up to 700 bar as a seal between pressurised space and atmosphere.
  • good sealing in low pressure ranges.
  • excellent static and dynamic sealing.
  • suitable for short travel.
  • recommended when holding or positioning under pressure.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  the.

 

application

 

not bolded symbols; please consult our technical for application limitations

direction is changed).

  

category of profile

machined only.

 

single acting

the RS04-A seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g.clutch operation).
  • as rod seals for clamping functions.

 

note

  • only when mounted, does this seal have the correct functioning dimension. when slipping the seal over the piston rod, it may appear too big.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high degree of friction.
  • high break-awaymoment.
  • the recovery volume  is smaller than with simple lip seals.
  • cross-section limited to 20 mm.

 

function

RS04-A profiles are lip seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

materials such as Viton, Silicone, EPDM, H-NBR, etc. can also be used for the preload element, but they are only useful in specific cases (temperature or

chemical influences). the temperature limits are also determined by the supporting element; using special material can expand the temperature range.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
100 bar (10 MPa) 0.80 1.00 1.50 1.80 2.10 2.20
200 bar (20 MPa) 0.60 0.70 1.00 1.20 1.30 1.50
300 bar (30 MPa) 0.40 0.5 0.70 0.75 0.80 1.25
400 bar (40 MPa) 0.25 0.30 0.50 0.50 0.60 0.75
600 bar (60 MPa) 0.20 0.25 0.25 0.25 0.25 0.25
700 bar (70 MPa) 0.10 0.12 0.13 0.14 0.15 0.16

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

 

recommended guide tolerance D1:

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

 

 

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 Ød + 8 6.3 4
25 ~ 49,9 Ød + 10 8 5
50 ~ 149,9 Ød + 15 10 7.5
150 ~ 299,9 Ød + 20 14 10
300 ~ 499,9 Ød + 25 17 12.5
500 ~ 699,9 Ød + 30 25 15
700 ~ 1000 Ød + 40 32 20
> 1000 Ød + 40 32 20

 

fitted:

 

 

www.jetseal-pars.com

 

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

 

 

 

 

 

Features

  • Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  • Wider groove and softer lips compared to PRS06.
  • Excellent static and dynamic sealing performance. 
  • Excellent performance in low pressure conditions. 
  • Useable for long stroke lengths.
  • Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating pistons/rods in hydraulic cylinders, plungers etc. where low friction is required.

Universal piston / rod seal for small extrusion gaps and minor work loads. Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

 

 

 

 

 

Features

  •  Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  •  Wider groove and softer lips compared to PRS06.
  •   Excellent static and dynamic sealing performance. 
  •  Excellent performance in low pressure conditions. 
  •  Useable for long stroke lengths.
  • Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating pistons/rods in hydraulic cylinders, plungers etc. where low friction is required.

Universal piston / rod seal for small extrusion gaps and minor work loads. Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

 

 

 

 

 

Features

  • Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  • Wider groove and softer lips compared to PRS06.
  • Excellent static and dynamic sealing performance. 
  • Excellent performance in low pressure conditions. 
  • Useable for long stroke lengths.
  •  Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating pistons/rods in hydraulic cylinders, plungers etc. where low friction is required.

Universal piston / rod seal for small extrusion gaps and minor work loads. Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

Features

c:: Symmetrical, single acting piston/rod seal, no interference on the ID or OD.

c:: Wider groove and softer lips compared to PRS06. c:: Excellent static and dynamic sealing performance. c:: Excellent performance in low pressure conditions. c:: Useable for long stroke lengths.

c:: Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating pistons/rods in hydraulic cylinders, plungers etc. where low friction is required.

Universal piston / rod seal for small extrusion gaps and minor work loads. Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

 

 

 

 

 

Features

  •  Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  •  Wider groove and softer lips compared to PRS06. 
  • Excellent static and dynamic sealing performance.
  • Excellent performance in low pressure conditions.
  • Useable for long stroke lengths.
  •  Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating pistons/rods in hydraulic cylinders, plungers etc. where low friction is required.

Universal piston / rod seal for small extrusion gaps and minor work loads. Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

 

 

 

 

 

Features

  •  Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  •  Wider groove and softer lips compared to PRS06.
  • Excellent static and dynamic sealing performance.
  • Excellent performance in low pressure conditions. 
  • Useable for long stroke lengths.
  •  Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating pistons/rods in hydraulic cylinders, plungers etc. where low friction is required.

Universal piston / rod seal for small extrusion gaps and minor work loads. Max. pressure 160 bar, max. speed 0.5 m/s.

 

Installation

Snap-in installation

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

description

O-Ring activated symmetric rod seal for simple standard applications, not recom- mended  for new designs (profile RS03 preferred).

 

 

 

 

 

 

  • symmetric single-acting rod compact rings. an O-ring inserted into the groove increases the preload.
  • no interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphere.
  • good sealing in low pressure ranges.
  • good static and dynamic sealing.
  • suitable for short travel.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  thedirection is changed).
  • recommended for holding position under pressure

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS07 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g.clutch operation).
  • as rod seals for clamping seals.
  • replacement for rubber fabric compact seals.

 

note

  • under certain operating conditions, this seal may “pump” via the trailing side, i.e. as it does not fit tightly on the outside diameter, small amounts of operating  media may be pressed out when the seal is deformed  under pressure which may appear to be leakage.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high friction.
  • high break-awaymoment.
  • the recovery capacity is smaller than with simple lip rings.
  • cross-section limited to 20 mm.
  • not suitable for new designs (prefer the more modern RS03 type).

 

function

RS07 profiles are lip seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the design

is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the

sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the

geometry in the software program.

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

other materials such as Viton, Silicone, EPDM, H-NBR, etc., can be used for the preload element, but they are only useful in specific cases (temperature or

chemical influences).

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
100 bar (10 MPa) 0.18 0.22 0.32 0.38 0.45 0.53
200 bar (20 MPa) 0.12 0.16 0.25 0.33 0.40 0.45
300 bar (30 MPa) 0.07 0.13 0.21 0.28 0.36 0.42
400 bar (40 MPa) 0.05 0.10 0.19 0.26 0.33 0.39

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the table applies to an operating temperature  of 70 °C.

use larger cross sections to increase maximum allowed gap dimension. if the permissible extrusion gap cannot be achieved, RS 07 is to be used.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on radial cross section (cs), seal may be snapped into a closed housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

recommended guide tolerance D1:

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 Ød + 8 6.3 4
25 ~ 49,9 Ød + 10 8 5
50 ~ 149,9 Ød + 15 10 7.5
150 ~ 299,9 Ød + 20 14 10
300 ~ 499,9 Ød + 25 17 12.5
500 ~ 699,9 Ød + 30 25 15
700 ~ 1000 Ød + 40 32 20
> 1000 Ød + 40 32 20

 

fitted

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

asymmetric compact rod seal with stable fit in the housing. compact design mainly used to seal high viscosity fluids or for extreme small housings, not suitable for high speed applications. RS08 with small groove.

 

 

 

 

 

 

  • asymmetric single-acting rod compact seals. the preload is achieved by the inter- nal stress of the seal material.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphere.
  • good sealing in all pressure ranges.
  • excellent static and dynamic sealing.
  • suitable for short travel.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  thedirection is changed).
  • recommended when holding or positioning under pressure.
  • special design for small cross-sections.
  • design RS08 with variable groove for reduced preload in special cases (e.g. toohigh friction).
  • due to high contact pressure particulary suitable for high viscosity media.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS08 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g. clutch operation).
  • as rod seals for applications with clamping functions or damping elements with high viscosity fluids.

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too large.
  • the ratio between nominal width and sealing height cs/H should not drop below a value of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high degree of friction.
  • high break-awaymoment.
  • the recovery  volume  is smaller than with simple lip seals.
  • cross-section limited to 15 mm.

 

function

RS08 profiles are compact seals designed to seal pressurised space against the atmosphere  mainly for reciprocating  move- ments. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
10 0.20 0.20 0.30 0.40 0.45 0.50
20 0.10 0.15 0.25 0.35 0.40 0.45
30 0.07 0.12 0.22 0.30 0.35 0.43
40 0.05 0.10 0.18 0.25 0.32 0.40

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), the seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

recommended guide tolerance D1:

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see jet seal pars catalog...

 

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 Ød + 8 6.3 4
25 ~ 49,9 Ød + 10 8 5
50 ~ 149,9 Ød + 15 10 7.5
150 ~ 299,9 Ød + 20 14 10
300 ~ 499,9 Ød + 25 17 12.5
500 ~ 699,9 Ød + 30 25 15
700 ~ 1000 Ød + 40 32 20
> 1000 Ød + 40 32 20

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

as profile RS08-A, but more adaptation possibilities for diverse temperatures and media by selection of suitable seal material.

 

 

 

 

 

 

 

  • asymmetric single-acting rod compact seals. the preload is achieved by the inter- nal stress of the seal material.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 160 bar as a seal between pressurised space and atmosphere.
  • good sealing in low pressure ranges.
  • excellent static and dynamic sealing.
  • suitable for short travel.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  thedirection is changed).
  • recommended when holding or positioning under pressure.
  • special design for small cross-sections.
  • due to high contact pressure particulary suitable for high viscosity media.

 

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined only.

 

single acting

the RS08-A seal is designed for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g.clutch operation).
  • as rod seals for applications with clamping functions or damping elements with high viscosity fluids.

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too large.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high degree of friction.
  • high break-awaymoment.
  • the recovery volume  is smaller than with simple lip seals.
  • cross-section limited to 15 mm.

 

function

RS08-A profiles are compact seals designed to seal pressurised space against the atmosphere mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
50 bar (5 MPa) 0.18 0.22 0.26 0.30 0.33 0.36
100 bar (10 MPa) 0.16 0.18 0.24 0.27 0.31 0.35
160 bar (16 MPa) 0.14 0.17 0.22 0.25 0.27 0.33

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), the seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

 

recommended mounting space:

 

recommended guide tolerance D1:

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 24,9 Ød + 8 6.3 4
25 ~ 49,9 Ød + 10 8 5
50 ~ 149,9 Ød + 15 10 7.5
150 ~ 299,9 Ød + 20 14 10
300 ~ 499,9 Ød + 25 17 12.5
500 ~ 699,9 Ød + 30 25 15
700 ~ 1000 Ød + 40 32 20
> 1000 Ød + 40 32 20

 

fitted:

 

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

Features

c:: Symmetrical, single acting piston/rod seal, no interference on the ID or OD.

c:: Wider groove and softer lips compared to PRS06. c:: Excellent static and dynamic sealing performance. c:: Excellent performance in low pressure conditions. c:: Useable for long stroke lengths.

c:: Negligible tendency to “stick-slip” effect above a speed of 0.15 m/s.

 

Application

Reciprocating rods in hydraulic cylinders, plungers. Dynamic seals in hydraulic systems.

Max. pressure 400 bar, max. speed 10 m/s. Tandem arrangement possible.

 

 

Installation

Snap-in installation.

Attention: PTFE glide rings needs calibration after installation!

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

description

O-Ring activated symmetric PTFE rod seal, low friction. for extreme low or high speed, suitable for positioning functions.

 

 

 

 

 

  • asymmetric double-acting composite rod seals, with a gliding part made of low friction material and an elastic preload element.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • the generously dimensioned chamfer reduces the risk of gap extrusion.
  • good sealing effect across a wide temperature range.
  • for pressures up to 400 bar (in special cases up to 800 bar) as a seal betweenpressurised spaces.
  • good sealing in all pressure ranges.
  • good static and dynamic sealing.
  • suitable for short and long travel with extremely slow or quick movements.
  • no stick-slip.
  • small break-awayload after prolonged periods of standstill.
  • exact positioning due to little friction.
  • high mechanical efficiency.
  • insensitive to thermal damage caused by air in the oil.
  • radial grooves assure a fast pressure activation of the seal (design and arrange-ment see “fabrication  tolerances for machined seals” es 222.209-d).
  • this seal can run over holes which are smaller than nominal seal height if theholes have suitable chamfered edges.

 

appllication

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

double acting

the RS09 seal is designed  for use as a piston seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,small swivelling motion permissible.
  • main field application is pressure intensifiers and control elements.
  • dimensions according to ISO 7425 part 2 are common, as well as standard types that differ slightly in the depth of the mounting

space. for specific dimensions see “range of profile sizes”.

 

note

  • there should be enough space for trailing oil.
  • the recovery capacity depends on the sealing system.
  • because of the fluid transport between the pressurized spaces this seal is only suitable to seal same media.

 

function

RS09 profiles are composite rod seals designed to seal between two pressurised spaces; mainly for reciprocating movements. the design

is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the seal-

ing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geom-

etry in the software program.

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leakage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

note on special materials:

as temperature limit and chemical resistance are determined by the preload element, the temperature range can be increased and the resis-

tance to chemical influences improved, if a special material is used for the preload element.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
2.45 3.65 5.35 7.55 10.25 12 13.65
safe extrusion gap (mm)
100 bar (10 MPa) 0.27 0.33 0.38 0.43 0.50 0.55 0.60
200 bar (20 MPa) 0.19 0.16 0.25 0.28 0.33 0.37 0.45
300 bar (30 MPa) 0.17 0.20 0.22 0.25 0.30 0.34 0.38
400 bar (40 MPa) 0.16 0.18 0.19 0.21 0.25 0.28 0.30

 

important note:

the above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. temperature range also dependent on medium”

the table  refers to a operating  temperature of 80°C. temperatures  below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

for extrusion gap sizes resulting from tolerance  pair H8/f8 pressure ranges above 400 bar can be reached  in special cases, influences due to

thermal expansion have to be considered. we recommend to contact our technical department.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on radial cross section (cs), seals may be snapped into a closed housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations  for D1 (=inside diameter of the guiding elements):

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
2.45 2.5 1.5
3.5 3.5 2
5.35 4.5 3
7.55 5 3.5
10.25 6 5
12 8 6
13.65 10 7


 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 

the ratio between  nominal width and seal height should be in accordance  to ISO 7425 part 1. we recommend the following values:

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 7,9 Ød + 4,9 2.2 2.45
8 ~ 18,9 Ød + 7,3 3.2 3.65
19 ~ 37,9 Ød + 10,7 4.2 5.35
38 ~ 199,9 Ød + 15,1 6.3 7.55
200 ~ 255,9 Ød + 20,5 8.1 10.25
256 ~ 649,9 Ød + 24 8.1 12
650 ~ 1.000 Ød + 27,3 9.5 13.65
> 1.000 Ød + 27,3 9.5 13.65

 

in case of large deviations of L use S09-DS.

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

O-Ring activated asymmetric  PTFE rod seal, low friction. in tandem design together with double acting wipers for extreme low or high speed or positioning functions. as primary seal in combination with secondary RS01 seal with good resistance to pres- sure shocks used in mobile hydraulics, machine tools, injection moulding machines, heavy hydraulics.

 

 

 

 

 

 

  • asymmetric single-acting composite rod seals, with a gliding part made of low friction material and an elastic preload element.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • mostly used in a sealing system, either in tandem arrangement with double wip-er
  • snaps into simple grooves (see notes on installation).
  • the free space on the trailing side reduces the risk of gap extrusion.
  • highest degree of sealing across a wide temperature range.
  • sealing effect enhanced by high recovery.
  • for pressures up to 400 bar (in special cases up to 800 bar) as a seal between pres-surised space and atmosphere.
  • good sealing in all pressure ranges.
  • good static and dynamic sealing.
  • suitable for short and long travel with extremely slow or quick movements.
  • no stick-slip.
  • small break-awayload after prolonged periods of standstill.
  • exact positioning due to little friction.
  • high mechanical efficiency.
  • insensitive to thermal damage caused by air in the oil.

 

application

category of profile

machined or molded/standard/trade product.

 

single acting

the RS 09-B seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,small swiveling motion permissible.
  • as rod seal in tandem arrangement for positioning tasks for machine tools and robots.
  • as rod seal in combination with lip seals as secondary seal for rough operations (e.g.construction machines, heavy machinery).
  • for heavy-dutyoperating conditions, profile S09-ES is preferred.
  • dimensions according to ISO 7425 part 2 are common, as well as standard types that differ slightly in the depth of the mounting

space. for specific dimensions see “range of profile sizes”.

 

note

  • the calculation program is based on mounting spaces according to ISO 7425, part 2. intermediate sizes are possible, with an O-ring for standard  sizes. for deviating dimensions, use S09-ES. attention must be given to a balanced ratio between sealing part and preload element.
  • there should be enough space for trailing oil.
  • the recovery capacity depends on the sealing system.

 

function

RS 09-B profiles are composite rod seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements.

the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined

in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the

geometry in the software program.

 

operating parameters & material

sealing element energizer temperature °C max-surface speed max-pressure hydrolysis dry running wear resistance
 PTFE glas NBR 70 SH-A -30 °C ... +100 10 m/s

400 bar (40 MPa)

800 bar (80 MPa)3

- ++ +
PTFE bronze NBR 70 SH-A -30 °C ... +100 10 m/s - ++ +
PTFE carbon NBR 70 SH-A -30 °C ... +100 10 m/s - ++ +
 PTFE glass NBR 75 SH-A -20 °C ... +200 10 m/s - ++ +
PTFE bronze NBR 75 SH-A -20 °C ... +200 10 m/s - ++ +
 PTFE carbon NBR 75 SH-A -20 °C ... +200 10 m/s - ++ +
PTFE glass EPDM 70 SH-A -50 °C ... +150 10 m/s ++ ++ +
 PTFE bronze EPDM 70 SH-A -50 °C ... +150 10 m/s ++ ++ +
PTFE carbon EPDM 70 SH-A -50 °C ... +150 10 m/s ++ ++ +
 PTFE glass MVQ 70 SH-A -60 °C ... +200 10 m/s ++ ++ +
PTFE bronze MVQ 70 SH-A -60 °C ... +200 10 m/s ++ ++ +
 PTFE carbon MVQ 70 SH-A -60 °C ... +200 10 m/s ++ ++ +
 UHMWPE MVQ 70 SH-A -60 °C ... +80 10 m/s 400 bar (40 MPa) ++ ++ +
HPU D57  NBR 70 SH-A -30 °C ... +110 5 m/s 600 bar (40 MPa) ++ + +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 attention: not suitable for mineral oils!

3 only in special cases (small extrusion gap, low surface speed).

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                            - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

note on special materials:

as temperature limit and chemical resistance are determined by the preload element, the temperature range can be increased and the resis-

tance to chemical influences improved, if a special material is used for the preload element.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
2.45 3.65 5.35 7.55 10.25 12 13.65
safe extrusion gap (mm)
100 bar (10 MPa) 0.27 0.33 0.38 0.43 0.50 0.55 0.60
200 bar (20 MPa) 0.19 0.16 0.25 0.28 0.33 0.37 0.45
300 bar (30 MPa) 0.17 0.20 0.22 0.25 0.30 0.34 0.38
400 bar (40 MPa) 0.16 0.18 0.19 0.21 0.25 0.28 0.30

 

important note:

the above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. temperature range also dependent on medium”

the table refers to a operating  temperature of 80°C. temperatures  below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

for extrusion gap sizes resulting from tolerance  pair H8/f8 pressure ranges above 400 bar can be reached  in special cases, influences due to

thermal expansion have to be considered. we recommend to contact our technical department.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on radial cross section (cs), seals may be snapped into a closed housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand


recommended mounting space:

two types of mounting space are recommended depending on application:

 

secondary seal

wiper

version 1

RS 09-B

RS 09-A

WR 11

WR 12

WR 13

WR14

WR15

version 2

RS01 and all U-ring Types

all type possible

 

the choice of the sealing system does not depend on the guide elements.

 

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations  for D1 (=inside diameter of the guiding elements):

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
2.45 2.5 1.5
3.5 3.5 2
5.35 4.5 3
7.55 5 3.5
10.25 6 5
12 8 6
13.65 10 7

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

the ratio between  nominal width and seal height should be in accordance  to ISO 7425 part 1. we recommend the following values:

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
5 ~ 7,9 Ød + 4,9 2.2 2.45
8 ~ 18,9 Ød + 7,3 3.2 3.65
19 ~ 37,9 Ød + 10,7 4.2 5.35
38 ~ 199,9 Ød + 15,1 6.3 7.55
200 ~ 255,9 Ød + 20,5 8.1 10.25
256 ~ 649,9 Ød + 24 8.1 12
650 ~ 1.000 Ød + 27,3 9.5 13.65
> 1.000 Ød + 27,3 9.5 13.65

 in case of large deviations of L use RS09-B.

 fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

O-Ring activated asymmetric  PU rod seal with excellent dynamic sealing capacity. used secondary  seal in tandem  design (together  with primary S09-B) to minimize  residual oil film. for mobile hydraulics, injection moulding machines, heavy hydraulics.

 

 

 

 

 

 

  • asymmetric single acting composite rod seals, with a gliding part made of excel- lent wear resistant polyurethane and an elastic preload element.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • mostly used in a sealing system as secondary seal in combination with a PTFEgliding part composite seal S09-B (same housing)  to minimize  the resident oilfilm, a double wiper is not needed.
  • for secondary sealing systems this seal can take sole sealing function.
  • snaps into simple grooves (see notes on installation).
  • the free space on the trailing side reduces the risk of gap extrusion.
  • highest degree of sealing across a wide temperature range.
  • sealing effect enhanced by high recovery.
  • for pressures up to 250 bar as a seal between pressurised space and atmosphere.
  • excellent sealing in all pressure ranges.
  • good static and dynamic sealing.
  • suitable for short and long travel with extremely slow or quick movements.
  • no stick-slip.
  • small break-away load after prolonged periods of standstill.

 

application

category of profile

machined only.

 

single acting

the RS09-C seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,small swivelling motion permissible.
  • as secondary rod seal in tandem arrangement for positioning tasks for machine tools and robots.
  • dimensions according to ISO 7425 part 2 are common, as well as standard types that differ slightly in the depth of the mountingspace. for specific dimensions see “range of profile sizes”.
  • in secondary sealing systems as single seal can take sole sealing function.

 

note

  • the calculation program is based on mounting spaces according to ISO 7425, part 2. intermediate sizes are possible, with an O-ring for standard  sizes. for deviating dimensions choose a different profile.
  • for tandem arrangement,there should be enough space for trailing oil, between the seals.
  • there should be enough space for trailing oil.
  • the recovery capacity depends on the sealing system.

 

function

RS09-C profiles are composite  rod seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

Rod Seal S09-C

  

operating parameters & material

sealing element energizer temperature max-surface speed max-pressure hydrolysis dry running wear resistance
 PU NBR (70 shore A) -30 °C ... +100  °C 1 m/s 250 bar (25 MPa) - + ++
HPU NBR (70 shore A) -20 °C ... +100  °C 1 m/s 250 bar (25 MPa) - + ++
LTPU NBR (70 shore A) -30 °C ... +100  °C 1 m/s 250 bar (25 MPa) - + ++
 SPU NBR (70 shore A) -20 °C ... +200  °C 1.4 m/s 250 bar (25 MPa) - ++ ++
CPU NBR (70 shore A) -30 °C ... +200  °C 1 m/s 250 bar (25 MPa) - + ++

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                            - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

as temperature limit and chemical resistance are determined by the preload element, the temperature range can be increased and the resis-

tance to chemical influences improved, if a special material is used for the preload element.

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
2.45 3.65 5.35 7.55 10.25 12
safe extrusion gap (mm)
5 0.30 0.35 0.45 0.55 0.66 0.70
10 0.25 0.30 0.35 0.35 0.45 0.55
15 0.20 0.25 0.25 0.30 0.35 0.40
20 0.15 0.20 0.20 .025 0.30 0.35
25 0.10 0.15 0.15 0.20 0.25 0.30

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem-

perature and gap value. temperature range also dependent on medium. the diagram applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

recommended housing for S09-P

L (ØD - Ød)/2 mm
ISO standard
2.2 2.45 2.5
3.2 3.65 3.75
4.2 5.35 5.5
6.3 7.55 7.75
8.1 10.25 10.5
8.1 12 12.25

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

two types of mounting space are recommended depending on application:

 

  primary seal secondary seal
version 1 RS 09-B RS 09-C
version 2 RS 09-C -

the choice of the sealing system does not depend on the guide elements.

 

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations  for D1 (=inside diameter of the guiding elements):

d f8 [mm] p ≤ 100 [bar] 100 < p ≤ 200 [bar] p > 200 [bar]
≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 >20 H8 H7

 

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
2.45 2.5 1.5
3.5 3.5 2
5.35 4.5 3
7.55 5 3.5
10.25 6 5
12 8 6
13.65 10 7

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

the ratio between  nominal width and seal height should be in accordance  to ISO 7425 part 2. we recommend the following values:

Ød [mm] cs = (ØD - Ød)/2 [mm] L [mm]
5 ~ 7,9 2,45 2,2
8 ~ 18,9 3,65 3,2
19 ~ 37,9 5,35 4,2
38 ~ 199,9 7,55 6,3
200 ~ 255,9 10,25 8,1
256 ~ 649,9 12 8,1

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

Description

the rod seal RS09-D is an rubber  energised plastic faced seal. the seal is designed to expand and improve the service parameters of O-Rings and is installed in existing O-Ring grooves.

RS 09-D combines the flexibility and response of O-Rings with the wear and friction characteristics of the PTFE+.... materials in dynamic applications.

the figures below shows the cross section of the RS09-D.

the double acting performance of the seal follows from the symmetrical cross section which allow the seal to respond to pressure in both directions.

initial contact pressure is provided by radial compression of the O-Ring. when the system pressure is increased the O-Ring transforms this into additional contact pres- sure, the contact pressure of the seal is thereby automatically adjusted so sealing is ensured under all service conditions.

 

application

category of profile

machined or molded/standard/trade product.

 

double acting

the S09-SB seal is designed for use as a rod seal.

 

area of application: hydraulics

the RS09 D is preferably used as a double  acting  seal for hydraulic and pneumatic equipment in sectors such as:

  • machine tools
  • handling devices
  • manipulators
  • valves
  • chemical process equipments.

it is particular recommended for light duty and small diameter applications.

 

 

notches

 RS09-D is as standard supplied without radial notches, as the thin radial section of the seal gives good response to pressure variations. for diameters from 8 mm notches on both sides are optional. these ensure direct pressurizing of the seal under all operating conditions.

 

 

advantages

  • compact groove dimensions and simple installation.
  • low friction without stick-slip.
  • resistance against wear and extrusion.
  • rod seals available for all diameters from 2 to 999.9 mm.
  • standard cross sections cover AS 568A and important metric O-Rings, other cross sections available on request.
  • fits also groove dimensions per MIL-G-5514F.

 

 

operating parameters & material for standard application:

material temperature˚C max-surface speed max-pressure
sealing element energizer
PTFE 40% bronze NBR 70 SH-A -30˚C … + 100 15 m/s 350 bar (350 MPa)
TNBR 70 SH-A  -45˚C … + 80 15 m/s 350 bar (350 MPa)
FPM 70 SH-A -10˚C … + 200 15 m/s 350 bar (350 MPa)

 

 

for hydraulic components with reciprocating movement in mineral oils containing zinc or medium with good lubricating performance and hard mating surface.

standard material for hydraulics, high compressive strength, good sliding and wear properties, good extrusion resistance, BAM tested. mating surface material: steel tubes, steel hardened cast iron.

colour: greyish to dark brown.

 

 

operating parameters & material for special application:

material temperature˚C max-surface speed max-pressure
sealing element energizer

 PTFE carbon

 

NBR 70 SH-A -30˚C … + 100 15 m/s 250 bar (25 MPa)
TNBR 70 SH-A  -45˚C … + 80 15 m/s 250 bar (25 MPa)
 FKM 70 SH-A -10˚C … + 200 15 m/s 250 bar (25 MPa)
EPDM 70 SH-A -45˚C … + 145 15 m/s 250 bar (25 MPa)


 

short stroke movements, poor lubricating fluids and soft mating surfaces. for all lubricating and non-lubricating hydraulic fluids, soft mating surfaces.

mating surface material: steel, steel hardened cast iron, stainless steel, aluminium, bronze. colour: black

important note:

the above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. temperature range also dependent on medium.

1 pressure ratings are dependent on the size of the extrusion gap.

2 attention: not suitable for mineral oils!

 

installation dimensions

rod diameter - d (f8/h9) D (H9) L + 0,2 r max. permissible gap dimension - s 1  O-Ring cross section
standard application light application 2 MPa 10 MPa 20 MPa 35 MPa
4 ~9,9 2 ~129,9 d + 2,9 2,4 0.4 0.10 0.10 0.08 0.05 1.78
10 ~19,9 5 ~249,9 d + 4,5 3.6 0.4 0.15 0.15 0.10 0.07 2.62
20 ~39,9 5 ~449,9 d + 6,2 4.8 0.6 0.25 0.20 0.15 0.08 3.53
40 ~119,9 12 ~649,9 d + 9,4 7.1 0.8 0.35 0.25 0.20 0.10 5.33
120 ~649,9 60 ~ 999,9 d + 12,2 9.5 0.8 0.50 0.30 0.25 0.15 7.00
650 ~999,9 110 ~999,9 d + 15,0 10.0 1.0 0.60 0.40 0.30 0.20 8.40

 

important note:

the above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. temperature range also dependent on medium.

1 at pressures > 40 MPa use diameter tolerance H8/f8 (bore/piston) in area of the seal. the radial clearance is valid for material PTFE + Bronze at

+60°C.

 

surface quality

surface roughness

material

Rtmax [µm]

Rz DIN [µm]

Ra [µm]

mating surface PTFE + …… 0.63 - 2.50 0.40 - 1.60 0.05 - 0.20
PU & Rubber 1.00 - 4.00 0.63 - 2.50 0.10 - 0.40
groove surface < 16 < 10.0 < 1.6

 

tolerance recommendation

seal housing tolerances
Ød f8/h9
ØD H9

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

rod seal S09-SD consisting of profile ring and O-ring as a preload  component

 

application

 

 

 

category of profile

machined or molded/standard/trade product.

double acting

the RS 09-FI seal is designed for use as a piston seal.

area of application: hydraulics advantages

rod seal for lower pressure range with properties of :

  • low friction
  • low housing height

 operating parameters & material

material temperature°C max-surface speed max-pressure
sealing element energizer
PTFE +40%bronze NBR 70 SH-A -30 °C ... +100 2 m/s 160 bar (16 MPa)

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2 ≤0,05-0,3
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

gap dimension

the decisive factor for the function of the seal is the largest gap dimension occurring during operation on the non-pressurised side of the seal.

we recommend a metal guide H8/f7.

 

fitting & installation

careful fitting is a prerequisite  for the correct function of the seal.

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see JET SEAL PARS catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

chevron sealing set, machined surface design. for heavy industry hydraulics.

 

 

 

 

 

 

 

  • symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
  • various materials are available for different purposes.
  • good sealing in all pressure ranges,particularly in the low pressure range.
  • for pressures up to 500 bar as a seal between pressurized space and atmosphere.
  • excellent static and dynamic sealing.
  • suitable for short and long travel.
  • very sturdy and wear-resistant.
  • insensitive to thermal damage caused by air in the oil.
  • open, preferably adjustable,mounting space required (see mode of installation).
  • the sealing packing can be used both as a rod seal and single-acting piston seal.
  • by combining various materials,the packing can be adjusted to the operatingconditions.
  • by varying the number of packings,friction as well as leakage behavior can beinfluenced.
  • for easier installation, seals can be split (see mode of installation).
  • mainly used for repair purposes. use more modern systems for new designs.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

single acting

the RS1012 seal is designed for use as a rod seal.

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders; small swiveling motion also permissible.
  • especially for heavy hydraulic applications or heavy-dutyoperating conditions.
  • for repairs of heavy machinery and for normal wear,when re-tightening is possible.

 

note

  • expensive and complex design.
  • high degree of friction and thus little mechanical efficiency.
  • for small numbers.for large amounts, the RS1012 profile is preferred.
  • too many chevrons or too high clamping torque at installation can load to increased friction and wear (for standing applications usemaximum 3-4 chevrons).
  • if a split version is used,the packings must be made slightly larger (approx. 1% in the diameter). the packing as well as the pressureand male ring are cut straight. at least 3 packings should be provided, preferably  5.

 

function

RS1012 profiles are single-acting rod chevron sets designed to seal pressurized space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material  (max. pressure=500 bar (50 MPa))

material temperature  °C  max. surface speed hydrolysis dry running wear resistance
RS10 RS11 RS12
POM/PA PU POM/PA -30 ... +100 0,5 m/s - + +
POM/PA HPU POM/PA -20 ... +100 0,5 m/s + + +
POM/PA LTPU POM/PA -40 ... +100 0,5 m/s - + +
POM/PA SPU POM/PA -20... +100 0,7 m/s + + +
POM/PA CPU POM/PA -30 ... +100 0,5 m/s + + +
 PTFE glass NBR PTFE glass -30 ... +100 0,5 m/s - - O
PTFE glass FKM PTFE glass -20 ... +200 0,5 m/s - - O
PTFE glass EPDM PTFE glass -50 ... +150 0,5 m/s ++ - O
PTFE glass HNBR PTFE glass -25 ... +150 0,5 m/s + O +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                            - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, polyurethane materials increase wear resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE materials).

 

gap dimension

when using a pressure ring, the extrusion gap is already integrated  in the seal. the gap between piston rod and housing should not exceed cs·0.05.

 

manufacturing notes

the following nominal widths are preferred. the theoretical packing height SH11 should be designed in accordance with the recommended values;

 

CS SH11
(4) 2.2
5 2.5
(6) 3.0
7.5 3.5
10 5.0
12.5 6.0
15 7.5
20 10
(25) 12.5
(30) 15

 in order to be able to maintain the required height irrespective of the accumulated packing height ‘h’, the pressure ring is individually adjusted during the production of the V-packing set. to do so, a control dimension  is provided  by the machine  software with a view to assisting this process.

 surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 mode of installation

insert the male ring first, then the packing  and finally the pressure ring (well greased)  into the installation  space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes); re-tighten depending  on leakage. in the case of wear, re-tightening is also possible.

if split seals are used, the packing should be fitted by separating the split ends axially (twisting). joints should be staggered by 90 to 120 degrees relative to each other. split ends should be inserted into the groove first and then the remainder  of the seal is pressed in.

 

recommended mounting space:

the adjustment range of the mounting space height (L) should correspond to approx. 10% of the theoretical mounting length. a guideline for the height of the spacer should be approx. 30% of the cross section.

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance with following recommendations (see also manufacturing notes)

 

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
10 - 39,9 ød + 10 16 5
40 - 74,9 ød + 15 25 7.5
75 - 149,9 ød + 20 32 10
150 - 199,9 ød + 25 40 12.5
200 - 300 ød + 30 50 15
> 300 ød + 40 63 20

 

 

fitted:

 don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

chevron sealing set, machined surface design. for heavy industry hydraulics.

 

 

 

 

 

 

  • symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
  • various materials are available for different purposes.
  • good sealing in all pressure ranges,particularly in the low pressure range.
  • for pressures up to 500 bar as a seal between pressurized space and atmosphere.
  • excellent static and dynamic sealing.
  • suitable for short and long travel.
  • very sturdy and wear-resistant.
  • insensitive to thermal damage caused by air in the oil.
  • open, preferably adjustable,mounting space required (see mode of installation).
  • the sealing packing can be used both as a rod seal and single-acting piston seal.
  • by combining various materials,the packing can be adjusted to the operatingconditions.
  • by varying the number of packings,friction as well as leakage behavior can beinfluenced.
  • for easier installation, seals can be split (see mode of installation).
  • mainly used for repair purposes. use more modern systems for new designs.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

single acting

the RS1012-A seal is designed for use as a rod seal.

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders; small swiveling motion also permissible.
  • especially for heavy hydraulic applications or heavy-dutyoperating conditions.
  • for repairs of heavy machinery and for normal wear,when re-tightening is possible.

 

note

  • expensive and complex design.
  • high degree of friction and thus little mechanical efficiency.
  • for small numbers.for large amounts, the RS1012 profile is preferred.
  • too many chevrons or too high clamping torque at installation can load to increased friction and wear (for standing applications usemaximum 3-4 chevrons).
  • if a split version is used,the packings must be made slightly larger (approx. 1% in the diameter). the packing as well as the pressureand male ring are cut straight. at least 3 packings should be provided, preferably 5.

 

function

RS1012-A profiles are single-acting rod chevron sets designed to seal pressurized space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material (max. pressure=500 bar (50 MPa))

material temperature °C max. surface speed hydrolysis dry running wear resistance
header ring RS10-A sealing element RS11-A back-up ring RS12-M
POM /PA PU POM /PA -30  ... +100 0,5 m/s - + +
POM /PA HPU POM /PA -20 ... +100 0,5 m/s + + +
POM /PA LTPU POM /PA -40 ... +100 0,5 m/s - + +
POM /PA  SPU POM /PA -20... +100 0,7 m/s + + +
POM /PA CHPU POM /PA -30 ... +100 0,5 m/s + + +
PTFE glass NBR PTFE glass -30 ... +100 0,5 m/s - - O
 PTFE glass FKM  PTFE glass -20 ... +200 0,5 m/s - - O
PTFE glass  EPDM PTFE glass -50 ... +150 0,5 m/s ++ - O
PTFE glass HNBR PTFE glass -25 ... +150 0,5 m/s + O +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, polyurethane materials increase wear resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE materials).

 

gap dimension

when using a pressure ring, the extrusion gap is already integrated in the seal. the gap between piston rod and housing should not exceed cs·0.05.

 

manufacturing notes

the following nominal widths are preferred. the theoretical packing height SH11 should be designed in accordance with the recommended values;

 

CS SH11
(4) 2.2
5 2.5
(6) 3.0
7.5 3.5
10 5.0
12.5 6.0
15 7.5
20 10
(25) 12.5
(30) 15

 

in order to be able to maintain the required height irrespective of the accumulated packing height ‘h’, the pressure ring is individually adjusted during the production of the V-packing set. to do so, a control dimension is provided by the machine software with a view to assisting this process.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

mode of installation

insert the male ring first, then the packing and finally the pressure ring (well greased) into the installation space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes); re-tighten depending on leakage. in the case of wear, re-tightening is also possible.

if split seals are used, the packing should be fitted by separating the split ends axially (twisting). joints should be staggered by 90 to 120 degrees relative to each other. split ends should be inserted into the groove first and then the remainder of the seal is pressed in.

 

recommended mounting space:

the adjustment range of the mounting space height (L) should correspond to approx. 10% of the theoretical mounting length. a guideline for the height of the spacer should be approx. 30% of the cross section.

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage to the rod seal during installation, the piston rod is to be chamfered and rounded as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰ ... 20⁰ α = 20⁰ ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance with following recommendations (see also manufacturing notes)

 

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
10 - 39,9 ød + 10 16 5
40 - 74,9 ød + 15 25 7.5
75 - 149,9 ød + 20 32 10
150 - 199,9 ød + 25 40 12.5
200 - 300 ød + 30 50 15
> 300 ød + 40 63 20

 

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

chevron sealing set, design with flexible sealing lips, good sealing ability in higher pressure range. for heavy industry hydraulics, water-hydraulic systems.

 

 

 

 

 

  • symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
  • various materials are available for different purposes.
  • good sealing in the higher pressure range.
  • due to the strong trailing side suitable for pressures up to 600 bar as a seal be-tween pressurized space and atmosphere.
  • excellent static and dynamic sealing.
  • suitable for short and long travel.
  • very sturdy and wear-resistant.
  • insensitive to thermal damage caused by air in the oil.
  • open mounting space required (see mode of installation).
  • the sealing packing can be used both as a rod seal and single-acting piston seal.
  • by varying the number of packings,friction as well as leakage behavior can beinfluenced.
  • mainly used for repair purposes.use more modern systems for new designs.
  • friction is less than with the RS1012 type,but greater than with more modernsealing systems (RS09-B and RS01 combination). the mechanical efficiency of thispacking is thus less than that of more state-of-the- art systems.
  • the central support prevents wedging of the individual packings under pressure.therefore the frictional forces in the high pressure range are relatively low.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

single acting

the RS13-15 seal is designed for use as a rod seal.

area of application: hydraulics

  • linearly acting rods on hydraulic cylinders; small swiveling motion also permissible. especially for heavy hydraulic applications or heavy-duty operating conditions and in the case of tread wear.
  • used for sealing pistons and plungers of upstroke presses,where the return stroke is generated by it’s own weight.

 

note

  • expensive and complex design.
  • no adjustment possible.
  • split repair version is not possible.

 

function

RS13-15 profiles are single-acting rod seal sets designed to seal pressurised space against the atmosphere; mainly for reciprocating move- ments. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are

as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material(max. pressure=500 bar (50 MPa))

material temperature°C  speed hydrolysis dry running wear resistance
header ring RS10 sealing element RS11 back-up ring RS12
POM /PA PU POM /PA -30 °C ... +100 0,5 m/s - + +
POM /PA HPU POM /PA -20 °C ... +100 0,5 m/s + + +
POM /PA LTPU POM /PA -40 °C ... +100 0,5 m/s - + +
POM /PA SPU POM /PA -20 °C ... +100 0,7 m/s + + +
POM /PA CHPU POM /PA -30 °C ... +100 0,5 m/s + + +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                            - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber ma-

terials are to be preferred, polyurethane materials increase wear resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE

materials).

 

gap dimension

when using a pressure ring, the extrusion gap is already integrated in the seal. the gap between piston rod and housing should not exceed cs·0.05.

 

manufacturing notes

the following nominal widths are preferred. the theoretical packing height SH11 should be designed in accordance with the recommended values;

 

CS SH11
(4) 2.2
5 2.5
(6) 3.0
7.5 3.5
10 5.0
12.5 6.0
15 7.5
20 10
(25) 12.5
(30) 15

  

in order to be able to maintain the required height irrespective of the accumulated packing height ‘h’, the pressure ring is individually adjusted during the production of the V-packing set. to do so, a control dimension is provided by the machine software with a view to assisting this process.

 surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

insert the male ring first, then the packing and finally the pressure ring (well greased) into the installation space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes); re-tighten depending on leakage. in the case of wear, re-tightening is also possible.

if split seals are used, the packing should be fitted by separating the split ends axially (twisting). joints should be staggered by 90 to 120 degrees relative to each other. split ends should be inserted into the groove first and then the remainder of the seal is pressed in.

 

recommended mounting space:

the adjustment range of the mounting space height (L) should correspond to approx. 10% of the theoretical mounting length. a guideline for the height of the spacer should be approx. 30% of the cross section.

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage to the rod seal during installation, the piston rod is to be chamfered and rounded as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰ ... 20⁰ α = 20⁰ ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance with following recommendations (see also manufacturing notes)

 

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
10 - 39,9 ød + 10 16 5
40 - 74,9 ød + 15 25 7.5
75 - 149,9 ød + 20 32 10
150 - 199,9 ød + 25 40 12.5
200 - 300 ød + 30 50 15
> 300 ød + 40 63 20

 

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

simple hat seal, usually fixed in housing with clamp flange. mainly used for replace- ment in old hydraulic and pneumatic cylinders or for secondary applications.

 

 

 

 

 

  • asymmetric single acting rod lipseals.
  • the profile is clamped at the flange, thereby ensuring stability and static sealingeffect.
  • various materials are available for different purposes.
  • sealing effect across a wide temperature range.
  • radial inaccuracy or excentricity can be compensated by varying the length ofthe lip.
  • for pressures up to 160 bar as a seal between pressurised space and atmosphere,pivoting and rotary movement and also long seal lips allow only lower pressurevalues.
  • design A with chamfer,design B with radius (depending on housing).
  • suitable for long travel.
  • seal lip length affects to“stick-slip” behavior.
  • low break-awayload after prolonged periods of standstill.
  • mainly used as a replacement in older pneumatic or hydraulic cylinders.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS16 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic and pneumatic cylinders,push rods and fittings.
  • rod seal for applications with small extrusion gap and without special impact load.
  • replacement for old leather seals.
  • can also be used in rotating and pivoting applications at low loads (see also materials).

 

note

  • special designed mounting space is required.
  • complicated installation.
  • do not use for new designs.
  • housings with integrated radius on the non pressurised side (common for old leather seals) do not allow design A.

 

function

RS16 profiles are lip seals with clamp flange (also referred to as “hat seal”), designed to seal pressurised space against the atmosphere; mainly for reciprocating, but also for minor rotating and pivoting movements. the design is based on application  in standard hydraulic systems with conventional hydraulic oils, the use in pneumatic systems is quite common  as well. the operating parameters areas defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

material temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PU -30 °C ... +110  °C 0,5 m/s 160 bar (16 MPa) - - -
s-mart HPU -20 °C ... +110  °C 0,5 m/s 160 bar (16 MPa) ++ + ++
s-mart LTPU -50 °C ... +110  °C 0,5 m/s 160 bar (16 MPa) - + ++
s-mart SPU -20 °C ... +110  °C 0,7 m/s 160 bar (16 MPa) ++ ++ ++
s-mart NBR -30 °C ... +100  °C 0,5 m/s 160 bar (16 MPa) - - O
s-mart FKM -20 °C ... +200  °C 0,5 m/s 160 bar (16 MPa) - - O
s-mart EPDM2 -50 °C ... +150  °C 0,5 m/s 160 bar (16 MPa) ++ - O
s-mart HNBR -25 °C ... +150  °C 0,5 m/s 160 bar (16 MPa) + O +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber ma-

terials are to be preferred, polyurethan materials increase wear resistance. for higher gliding speeds another system should be used (e.g. PTFE materials)

 

operating parameters for rotating applications

  PU rubber
maximum gliding speed [m/s] 2 3
maximum pressure [bar] 7 5

 

these values are not valid for continous duty and strongly depending on the lip geometry. they are not to be used simultaneously. we also recommend contacting our technical department.

 

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
50 bar (5 MPa) 0.20 0.22 0.28 0.32 0.35 0.38
100 bar (10 MPa) 0.18 0.20 0.25 0.28 0.30 0.35
160 bar (16 MPa) 0.15 0.18 0.22 0.24 0.25 0.32

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD1 H12
ØD H10

 

mode of installation

special shaped, open housings are required. the axial compression of the flange should not exceed 5 to 10% of the height, a clamping torque limitation should be arranged. to avoid twisting in the sealing lip, the compression should occur only at the clamp flange.

 

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

p > 100 [bar]

≤ 100 H10 H8
> 100 ≤ 200 H10 H8
>200 H9 H8

 

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

 

seal & housing recommendations

this profile should only used as a replacement in already existing mounting spaces. use modern sealing systems for new designs.

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

simple hat seal, usually fixed in housing with clamp flange. mainly used for replace- ment in old hydraulic and pneumatic cylinders or for secondary applications.

 

 

 

 

 

  • asymmetric single acting rod lipseals.
  • the profile is clamped at the flange, thereby ensuring stability and static sealingeffect.
  • various materials are available for different purposes.
  • sealing effect across a wide temperature range.
  • radial inaccuracy or excentricity can be compensated by varying the length ofthe lip.
  • for pressures up to 160 bar as a seal between pressurised space and atmosphere,pivoting and rotary movement and also long seal lips allow only lower pressurevalues.
  • design A with chamfer,design B with radius (depending on housing).
  • suitable for long travel.
  • seal lip length affects to“stick-slip” behavior.
  • low break-awayload after prolonged periods of standstill.
  • mainly used as a replacement in older pneumatic or hydraulic cylinders.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS16-A seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic and pneumatic cylinders,push rods and fittings.
  • rod seal for applications with small extrusion gap and without special impact load.
  • replacement for old leather seals.
  • can also be used in rotating and pivoting applications at low loads (see also materials).

 

note

  • special designed mounting space is required.
  • complicated installation.
  • do not use for new designs.
  • housings with integrated radius on the non pressurised side (common for old leather seals) do not allow design A.

 

function

RS16-A  profiles are lip seals with clamp flange (also referred to as “hat seal”), designed to seal pressurised space against the atmosphere; mainly for reciprocating, but also for minor rotating and pivoting movements. the design is based on application  in standard hydraulic systems with conventional hydraulic oils, the use in pneumatic systems is quite common  as well. the operating parameters are

as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

material temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PU -30 °C ... +110  °C 0,5 m/s 160 bar (16 MPa) - - -
s-mart HPU -20 °C ... +110  °C 0,5 m/s 160 bar (16 MPa) ++ + ++
s-mart LTPU -50 °C ... +110  °C 0,5 m/s 160 bar (16 MPa) - + ++
s-mart SPU -20 °C ... +110  °C 0,7 m/s 160 bar (16 MPa) ++ ++ ++
s-mart NBR -30 °C ... +100  °C 0,5 m/s 160 bar (16 MPa) - - O
s-mart FKM -20 °C ... +200  °C 0,5 m/s 160 bar (16 MPa) - - O
s-mart EPDM2 -50 °C ... +150  °C 0,5 m/s 160 bar (16 MPa) ++ - O
s-mart HNBR -25 °C ... +150  °C 0,5 m/s 160 bar (16 MPa) + O +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubricationfilm.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber ma-

terials are to be preferred, polyurethan materials increase wear resistance. for higher gliding speeds another system should be used (e.g. PTFE materials)

 

operating parameters for rotating applications

  PU rubber
maximum gliding speed [m/s] 2 3
maximum pressure [bar] 7 5

 

these values are not valid for continous duty and strongly depending on the lip geometry. they are not to be used simultaneously.  we also recommend contacting our technical department.

 

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
50 bar (5 MPa) 0.20 0.22 0.28 0.32 0.35 0.38
100 bar (10 MPa) 0.18 0.20 0.25 0.28 0.30 0.35
160 bar (16 MPa) 0.15 0.18 0.22 0.24 0.25 0.32

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C .

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD1 H12
ØD H10

 

mode of installation

special shaped, open housings are required. the axial compression of the flange should not exceed 5 to 10% of the height, a clamping torque limitation should be arranged. to avoid twisting in the sealing lip, the compression should occur only at the clamp flange.

 

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

p > 100 [bar]

≤ 100 H10 H8
> 100 ≤ 200 H10 H8
>200 H9 H8

 

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 

 fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

the Rod  Seal RS 17 with asymmetrical profile, inner lip set back, additional support edge and sealing edge as well as press fit at the outside diameter.

 

 

 

 

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS16-A seal is designed for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic and pneumatic cylinders,push rods and fittings.
  • rod seal for applications with small extrusion gap and without special impact load.
  • replacement for old leather seals.
  • can also be used in rotating and pivoting applications at low loads (see also materials).

 

note

  • special designed mounting space is required.
  • complicated installation.
  • do not use for new designs.
  • housings with integrated radius on the non pressurised side (common for old leather seals) do not allow design A.

 

function

RS16-A profiles are lip seals with clamp flange (also referred to as “hat seal”), designed to seal pressurised space against the atmosphere; mainly for reciprocating, but also for minor rotating and pivoting movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils, the use in pneumatic systems is quite common as well. the operating parameters are

as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

material temperature max. surface speed max. pressure 1
s-mart PU (94 Shore A) -30 °C ... +110 °C 0,5 m/s 400 bar (40 MPa)

 

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubricationfilm.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber ma-

terials are to be preferred, polyurethan materials increase wear resistance. for higher gliding speeds another system should be used (e.g. PTFE materials)

 

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

these values are not valid for continous duty and strongly depending on the lip geometry. they are not to be used simultaneously. we also recommend contacting our technical department.

 

 

gap dimension

profile (ØD - Ød)/2 mm max. permissible gap dimension
10 26 32 40
4,0 ... 5,0 0.50 0.40 0.35 0.30
>5,0  ... 7,5 0.55 0.45 0.40 0.35
>7,5  ... 12,5 0.66 0.50 0.45 0.40
>12,5 0.60 0.55 0.50 0.45

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature of 70 °C .

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H11

 

fitting & installation

careful fitting is a prerequisite  for the correct function of the seal.

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

asymmetric rod seal as RS 17 , but due to design with active back-up ring suitable for larger extrusion gaps or higher pressure range.

 

 

 

 

  • asymmetric single-acting rod lip seal, with the dynamic sealing lip being shorter than the static one.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • the active back up ring on the trailing side of the seal reduces extrusion wear andallows larger gap dimensions resp higher system pressure.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 700 bar as a seal between pressurized space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • the secondary lip reduces the residual oil film.

 

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

 

single acting

the RS17-A seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • rod seals for applications with large extrusion gap and without specific impact load.
  • commonly used as sealing element in telescopic cylinders (for large deflections increased preload may be necessary).

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too big.
  • the ratio between nominal width and sealing height cs/H should not drop below a value of 1/1.4, small cross sections demand values up to 1/1.6.
  • recovery volume  is limited.
  • on long strokes drag pressure may be built up between both lips,which can lead to disfunction.

 

function

RS17-A profiles are lip seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the secondary lip on the back ensures a increased stability in the housing. the design is based on application  in standard hydraulic systems with con- ventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

material back-up ring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PU s-mart POM / s-mart PA2 -30 °C ... +110  °C 0,5 m/s 600 bar (60 MPa) - + +
s-mart HPU s-mart POM / s-mart PA2 -20 °C ... +110  °C 0,5 m/s 600 bar (60 MPa) + + +
s-mart LTPU s-mart POM / s-mart PA2 -50 °C ... +110  °C 0,5 m/s 600 bar (60 MPa) - + +
s-mart SPU s-mart POM / s-mart PA2 -20 °C ... +110  °C 0,7 m/s 600 bar (60 MPa) + + +
s-mart CPU s-mart POM / s-mart PA2 -30 °C ... +100  °C 0,5 m/s 600 bar (60 MPa) + + +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials)

note on special materials:

as the temperature limits are determined  by POM using special materials for the back up ring can expand the temperature limits.

 

 

gap dimension

 

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
200 bar (20 MPa) 0.60 0.75 0.90 1.20 1.30 1.50
400 bar (40 MPa) 0.25 0.40 0.45 0.50 0.60 0.75
600 bar (60 MPa) 0.10 0.10 0.13 0.15 0.20 0.25

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

ffor inside diameters of 25 mm or more, and dependant  on radial cross section (cs), the seals may be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height cs/H depends on the cross section. therefore we recommend the following housing heights.

cs = (ØD - Ød)/2 [mm] L [mm]
8 4
9 5
11 6
14 7.5
17 10
20 12.5
25 15
32 20

 

fitted:

 don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

as profile RS17-A1, but more adaptation possibilities for diverse temperatures and media by selection of suitable seal material.

 

 

 

 

  • asymmetric single-acting rod lip seal, with the dynamic sealing lip being shorter than the static one.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • for pressures up to 160 bar as a seal between pressurised space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • the secondary lip reduces the residual oil film.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS17-A1seal is designed for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • rod seals for applications with small extrusion gap and without specific impact load.
  • commonly used as sealing element in telescopic cylinders (for large deflections increased preload may be necessary).
  • can also be used as a pivot seal at low loads (e.g.end seal in rotary pivots).

 

note

  • this seal has the correct functioning dimension only when mounted. when slipping the seal over the piston rod, it may appear too big.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • on long strokes drag pressure may be built up between both lips,which can lead to disfunction.

 

function

RS17-A1profiles are lip seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the secondary lip on the back ensures a increased stability in the housing. the design is based on application  in standard hydraulic systems with con- ventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

material temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart NBR -30 °C ... +100  °C 0,5 m/s 160 bar (16 MPa) - - O
s-mart FKM -20 °C ... +200  °C 0,5 m/s 160 bar (16 MPa) - - O
s-mart EPDM2 -50 °C ... +150  °C 0,5 m/s 160 bar (16 MPa) ++ - O
s-mart HNBR -25 °C ... +150  °C 0,5 m/s 160 bar (16 MPa) + O +
s-mart MVQ -60 °C ... +200  °C - - ++ - -

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 attention: not suitable for mineral oils!

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased wear resistance and higher pressure range

polyurethane materials are to be preferred, attention should be paid to restrictions in chemical and thermal  resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE materials).

 

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
50 bar (5 MPa) 0.20 0.22 0.28 0.30 0.35 0.38
100 bar (10 MPa) 0.18 0.19 0.25 0.27 0.31 0.37
160 bar (16 MPa) 0.15 0.17 0.20 0.25 0.28 0.32

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25mm or more, and dependant  on radial cross section (cs), seals may be snapped into closed housings.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 the ratio between nominal width and seal height cs/H should not drop below 1/1,25. therefore we recommend the following housing heights.

cs = (ØD - Ød)/2 [mm] L [mm]
8 4
9 5
11 6
14 7.5
17 10
20 12.5
25 15
32 20

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

the profile RS17-C rod seal is the result of a further development od us with a sec- ondary sealing lip and a highly extrusion resistant back-up ring. due to the secondary lip, additional lubricant is retained in the sealing gap. (this greatly prevents dry-run and wear, thus increasing the seal’s service life).

additionally, this second sealing lip may even act as a substitute for a costly tandem arrangement when, under certain conditions, satisfactory sealing performance can only be achieved by two seals placed one behind the other in separate installation grooves. these seals may be used for all applications where the physical properties of normal or fabric reinforced elastomers are insufficient.

 

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS17-C SA seal is designed for use as a rod seal.

 

area of application: hydraulics

mainly for the sealing of piston rods and plungers on heavy duty applications in mobile and stationary hydraulics.

 

advantages

  • unusually high wear resistance.
  • insensibility against shock loads and pressure peaks.
  • high resistance against extrusion.
  • low compression set.
  • suitable for hardest working conditions.
  • sufficient lubrication due to pressure medium between the sealing lips.
  • increased sealing performance at zero pressure.
  • air penetration from out-side is largely prevented.
  • easy installation.

 

operating parameters & material

sealing element energizer back-up ring temperature max. surface speed max. pressure 1
s-mart PU (93 Shore A) s-mart NBR (70 shore A) s-mart POM / PA 2 -35˚C … + 110˚C 0,5 m/s 500 bar (50 MPa)

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤ 0.6
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤ 4.0

tolerance recommendation

 

seal housing tolerances
Ød f7
ØD H11

 

fitting & installation

the seals should have an axial clearance (see columns  H and L). to avoid damage at the sealing lips, the seals should not be pulled over sharp edges during installation.

normally these seals may be snapped into closed grooves. where access is restricted special assembly tools may be required. proposals for the design of such tools will be provided on request. tolerance guidelines H8/f7.

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

the profile RS17-C rod seal is the result of a further development od us with a sec- ondary sealing lip and a highly extrusion resistant back-up ring. due to the secondary lip, additional lubricant is retained in the sealing gap. (this greatly prevents dry-run and wear, thus increasing the seal’s service life).

additionally, this second sealing lip may even act as a substitute for a costly tandem arrangement when, under certain conditions, satisfactory sealing performance can only be achieved by two seals placed one behind the other in separate installation grooves. these seals may be used for all applications where the physical properties of normal or fabric reinforced elastomers are insufficient.

 

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS17-C SA seal is designed for use as a rod seal.

 

area of application: hydraulics

mainly for the sealing of piston rods and plungers on heavy duty applications in mobile and stationary hydraulics.

 

advantages

  • unusually high wear resistance.
  • insensibility against shock loads and pressure peaks.
  • high resistance against extrusion.
  • low compression set.
  • suitable for hardest working conditions.
  • sufficient lubrication due to pressure medium between the sealing lips.
  • increased sealing performance at zero pressure.
  • air penetration from out-side is largely prevented.
  • easy installation.

 

operating parameters & material

sealing element energizer back-up ring temperature max. surface speed max. pressure 1
s-mart PU (93 Shore A) s-mart NBR (70 shore A) s-mart POM / PA 2 -35˚C … + 110˚C 0,5 m/s 500 bar (50 MPa)

 

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤ 0.6
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤ 4.0

tolerance recommendation

 

seal housing tolerances
Ød f7
ØD H11

fitting & installation

the seals should have an axial clearance (see columns H and L). to avoid damage at the sealing lips, the seals should not be pulled over sharp edges during installation.

normally these seals may be snapped into closed grooves. where access is restricted special assembly tools may be required. proposals for the design of such tools will be provided on request. tolerance guidelines H8/f7.

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

the profile RS17-C rod seal is the result of a further development od us with a sec- ondary sealing lip and a highly extrusion resistant back-up ring. due to the secondary lip, additional lubricant is retained in the sealing gap. (this greatly prevents dry-run and wear, thus increasing the seal’s service life).

additionally, this second sealing lip may even act as a substitute for a costly tandem arrangement when, under certain conditions, satisfactory sealing performance can only be achieved by two seals placed one behind the other in separate installation grooves. these seals may be used for all applications where the physical properties of normal or fabric reinforced elastomers are insufficient.

 

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS17-C SA seal is designed for use as a rod seal.

 

area of application: hydraulics

mainly for the sealing of piston rods and plungers on heavy duty applications in mobile and stationary hydraulics.

 

advantages

  • unusually high wear resistance.
  • insensibility against shock loads and pressure peaks.
  • high resistance against extrusion.
  • low compression set.
  • suitable for hardest working conditions.
  • sufficient lubrication due to pressure medium between the sealing lips.
  • increased sealing performance at zero pressure.
  • air penetration from out-side is largely prevented.
  • easy installation.

 

operating parameters & material

sealing element energizer back-up ring temperature max. surface speed max. pressure 1
s-mart PU (93 Shore A) s-mart NBR (70 shore A) s-mart POM / PA 2 -35˚C … + 110˚C 0,5 m/s 500 bar (50 MPa)

 

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤ 0.6
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤ 4.0

tolerance recommendation

 

seal housing tolerances
Ød f7
ØD H11

fitting & installation

the seals should have an axial clearance (see columns H and L). to avoid damage at the sealing lips, the seals should not be pulled over sharp edges during installation.

normally these seals may be snapped into closed grooves. where access is restricted special assembly tools may be required. proposals for the design of such tools will be provided on request. tolerance guidelines H8/f7.

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

finger spring activated, asymmetrical PTFE rod seal, low friction and good dry run- ning properties, excellent chemical and thermal resistance, mainly used in chemical, pharma and food industry.

 

 

 

 

  • asymmetric single-acting rod lip seal, with the dynamic sealing lip being dif- ferently shaped than the static one. the preload is created by a finger spring inserted in the groove.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • good sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 200 bar as a seal between pressurised space and atmosphere(in certain cases also above that, see “gap dimensions”).
  • good sealing in all pressure ranges.
  • excellent static and dynamic sealing after short run-in time.
  • suitable for short and long travel.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  thedirection is changed).
  • little friction in dry running or in media with poor lubricating effect (in aqueousmedia only suitable to a limited extent).
  • low break-awayload.
  • flexible sealing lip due to large spring travel.

 

application

 

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

 

single acting

the RS 19 seal is designed  for use as a rod seal.

 

area of application: hydraulics

reciprocating and swiveling rods on cylinders, push rods, fittings in the chemical industry.

 

note

  • special measures required when used at temperatures below -60°C, because of material shrinkage.
  • considering the limited long-time rupture strength of PTFE materials,the cs/H ratio should not fall below a value of 1/1.5.
  • cross-sections limited to 10 mm.
  • varying the angle of the chamfer on the dynamic sealing lip allows adaptation to media (steeper angle for high viscosity media)

respectively a pressure relief (flat angle).

 

function

RS19 profiles are lip seals designed  to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in aggressive media or with high thermal demands. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

sealing element spring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PTFE virgin 14.310 -200 °C ... +260  °C 15 m/s 100 bar (10 MPa) ++ ++ +
s-mart PTFE  glass 14.310 -200 °C ... +260  °C 15 m/s 160 bar (16 MPa) ++ ++ +
s-mart PTFE bronze 14.310 -200 °C ... +260  °C 15 m/s 160 bar (16 MPa) ++ ++ +
s-mart UHMWPE 14.310 -200 °C ... +80  °C 15 m/s 200 bar (20 MPa) ++ + +

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

 

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
2 5 7.5 10
safe extrusion gap (mm)
2 0.16 0.35 0.55 0.65
10 0.11 0.25 0.40 0.50
15 0.09 0.23 0.35 0.45
20 0.07 0.20 0.30 0.40

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

 

the table refers to a operating temperature of 80°C. temperatures  below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

in exceptional cases, a pressure above the limit of 200 bar is possible, the safe extrusion gap is the result of the tolerance  pair H8/f8, influences

due to thermal expansion have to be considered. we also recommend contacting our technical department.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2 ≤ 0,05-0,3
bottom of groove ≤10 ≤1,6
groove face ≤10 ≤ 1,6

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

normally a open housing should be designed. the profile should not be snaped in, the spring may be damaged  and a faultless function can not be ensured.

in special cases a snap-in installation is possible, therefore the housing has to be designed accordingly. the seal can only be held by a retaining housing step, having a width of 0.25·cs and a distinctive 30° chamfer, all edges must be rounded. the smallest possible diameter for such a snap- in installation is 10·cs.

 

 

recommended mounting space:

 

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 with PTFE materials, the profile size does not so much depend on the seal diameter but rather on pressure and extrusion gap. this relationship is described under “gap dimensions”. nominal widths not shown in the diagram can be interpolated if required.

the ratio between nominal width and seal height cs/H should not drop below 1/1.5. therefore we recommend the following housing heights.

cs = (ØD - Ød)/2 [mm] L [mm]
2 3.5
3 5.1
4 6.5
5 8.8
6 10.2
7.5 12.8
17 10

 

fitted:

 don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

finger spring activated, asymmetrical PTFE rod seal, low friction and good dry run- ning properties, excellent chemical and thermal resistance, mainly used in chemical, pharma and food industry.

 

 

 

 

  • asymmetric single-acting rod lip seal, with the dynamic sealing lip being dif- ferently shaped than the static one. the preload is created by a finger spring inserted in the groove.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • good sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 200 bar as a seal between pressurised space and atmosphere(in certain cases also above that, see “gap dimensions”).
  • good sealing in all pressure ranges.
  • excellent static and dynamic sealing after short run-in time.
  • suitable for short and long travel.
  • no reverse leakage (i.e. minor relative motion of the sealing edges when thedirection is changed).
  • little friction in dry running or in media with poor lubricating effect (in aqueousmedia only suitable to a limited extent).
  • low break-awayload.
  • flexible sealing lip due to large spring travel.

 

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

 single acting

the RS 19 seal is designed for use as a rod seal.

 area of application: hydraulics

reciprocating and swiveling rods on cylinders, push rods, fittings in the chemical industry.

 note

  • special measures required when used at temperatures below -60°C, because of material shrinkage.
  • considering the limited long-time rupture strength of PTFE materials,the cs/H ratio should not fall below a value of 1/1.5.
  • cross-sections limited to 10 mm.
  • varying the angle of the chamfer on the dynamic sealing lip allows adaptation to media (steeper angle for high viscosity media)

respectively a pressure relief (flat angle).

 function

RS19 profiles are lip seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in aggressive media or with high thermal demands. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

sealing element temperature(C°) max. surface speed max. pressure hydrolysis dry running wear resistance
 PTFE virgin -200 ..  +260 15 m/s 100 bar (10 MPa) ++ ++ +
PTFE glass -200 ..  +260 15 m/s 160 bar (16 MPa) ++ ++ +
 PTFE bronze -200 ..  +260 15 m/s 160 bar (16 MPa) ++ ++ +
 UHMWPE -200 ..  +260 15 m/s 200 bar (20 MPa) ++ + +

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

 

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
2 5 7.5 10
safe extrusion gap (mm)
2 0.16 0.35 0.55 0.65
10 0.11 0.25 0.40 0.50
15 0.09 0.23 0.35 0.45
20 0.07 0.20 0.30 0.40

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

 

the table refers to a operating temperature of 80°C. temperatures below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

in exceptional cases, a pressure above the limit of 200 bar is possible, the safe extrusion gap is the result of the tolerance pair H8/f8, influences

due to thermal expansion have to be considered. we also recommend contacting our technical department.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2 ≤ 0,05-0,3
bottom of groove ≤10 ≤1,6
groove face ≤10 ≤ 1,6

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

normally a open housing should be designed. the profile should not be snaped in, the spring may be damaged and a faultless function can not be ensured.

in special cases a snap-in installation is possible, therefore the housing has to be designed accordingly. the seal can only be held by a retaining housing step, having a width of 0.25·cs and a distinctive 30° chamfer, all edges must be rounded. the smallest possible diameter for such a snap- in installation is 10·cs.

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage to the rod seal during installation, the piston rod is to be chamfered and rounded as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰ ... 20⁰ α = 20⁰ ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

with PTFE materials, the profile size does not so much depend on the seal diameter but rather on pressure and extrusion gap. this relationship is described under “gap dimensions”. nominal widths not shown in the diagram can be interpolated if required.

the ratio between nominal width and seal height cs/H should not drop below 1/1.5. therefore we recommend the following housing heights.

cs = (ØD - Ød)/2 [mm] L [mm]
2 3.5
3 5.1
4 6.5
5 8.8
6 10.2
7.5 12.8
17 10

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

 

 

 

 

 

 

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 

Features

  •    Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  •    Preload effected through round Helicoil-spring which ensures high pressure on the sealing edges.
  •    Excellent static and dynamic sealing performance.
  •    Excellent sealing performance in low and high pressure ranges.
  •    Useable for short and long stroke lengths.
  •    Low friction in dry running or poor lubrication conditions.
  •    Also used for gas applications.
  •    Negligible tendency to “stick-slip” effect, small break away loads.

 

Application

Reciprocating and swivelling pistons in hydraulic cylinders, plungers. Chemical and pharmaceutical industry, aggressive fluids and high temp. Max. pressure 160 bar, max. speed 5 m/s linear; 0,1m/s rotating.

 

Installation

Installation in open housing, snap-in installation possible in special designed housings.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤ 0.6
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤ 4.0

tolerance recommendation

 

seal housing tolerances
Ød f7
ØD H11

 

 

 

 

 

 

 

 

Function

Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.

 Features

  •  Symmetrical, single acting piston/rod seal, no interference on the ID or OD.
  •  Preload effected through round Helicoil-spring which ensures high pressure on the sealing edges.
  • Excellent static and dynamic sealing performance.
  •  Excellent sealing performance in low and high pressure ranges.
  •  Useable for short and long stroke lengths.
  • Low friction in dry running or poor lubrication conditions.
  • Also used for gas applications.
  • Negligible tendency to “stick-slip” effect, small break away loads.

 

Application

Reciprocating and swivelling pistons in hydraulic cylinders, plungers. Chemical and pharmaceutical industry, aggressive fluids and high temp. Max. pressure 160 bar, max. speed 5 m/s linear; 0,1m/s rotating.

 

Installation

Installation in open housing, snap-in installation possible in special designed housings.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤ 0.6
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤ 4.0

tolerance recommendation

 

seal housing tolerances
Ød f7
ØD H11

 

description

space saving, compact rod seal, fits standard O-Ring housings. advantage compared to O-Ring: integrated  active back-up rings for high pressure, design with interference fit on outside diameter maintains non-twisting in dynamic applications.

 

 

 

  • asymmetric double-acting rod compact seal. the preload is achieved by the inter- nal stress of the seal material.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • good sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate.
  • for pressures up to 700 bar as a seal between pressurised space and atmosphereor between pressurised spaces.
  • good sealing in the low pressure range.
  • excellent static sealing.
  • little inclination to“stick-slip”.
  • the housing grooves are same as housing grooves for O-rings(see “range ofprofile sizes”)
  • the activated back up rings reduce the risk of gap extrusion and prevent  twistingin dynamic applications.
  • space-saving design.

 

application

 

not bolded symbols; please consult our technical for application limitations

category of profile

machined only.

 

double acting

the RS 20 seal is designed for use as a rod seal.

 

area of application: hydraulics

  • static and dynamic seals in hydraulic and pneumatic systems.
  • use in systems with O-ringgrooves instead of O-rings in case of stability problems (twisting) or “pumping”.
  • for valve seals in offshore and aviation applications.

 

note

  • the design is based on standard O-ring dimensions according AS 568 A (american O-ring dimensions). in case of large deviations from standard groove dimensions the profile has to be checked .
  • a design in PU materials is not recommendable because of the large deformation force
  • recovery rate is lower compared  to standard lip seals.
  • high break-awayload after prolonged periods of standstill.

 

function

RS 20 profiles are compact seals designed to seal pressurised space against the atmosphere or between pressurised spaces mainly for re- ciprocating movements, but for slight rotations as well. the design is based on application  in standard hydraulic systems with conventional hydraulic oils, the use in pneumatic systems is furthermore  possible. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

sealing element back-up ring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart NBR s-mart POM / s-mart PA2 -30 °C ... +100  °C 0,5 m/s 700 bar (70 MPa) - - O
s-mart HNBR s-mart POM / s-mart PA2 -25 °C ... +100  °C 0,5 m/s 700 bar (70 MPa) + O +
s-mart FKM s-mart PAEK -20 °C ... +200  °C 0,5 m/s 700 bar (70 MPa) - - O
s-mart FKM s-mart PTFE  glass -25 °C ... +200  °C 0,5 m/s 700 bar (70 MPa) - - O
s-mart HNBR s-mart PAEK -20 °C ... +150  °C 0,5 m/s 700 bar (70 MPa) + O +
s-mart HNBR s-mart PTFE  glass -25 °C ... +150  °C 0,5 m/s 700 bar (70 MPa) + O +

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased wear resistance and higher pressure range

polyurethane materials are to be preferred, attention  should be paid to restrictions in chemical and thermal  resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE materials).

note on special materials:

as the temperature limits are determined by POM, using special materials  for the back up ring can expand the temperature limits.

 

gap dimension

the size of the permissible gap on the side opposite the source of pressure depends mainly on the seal material and the design of the seal. if the permissible gap dimensions are exceeded, there will be extrusion wear on the side opposite the source of pressure which may make the seal unfit for usage.

the maximum value of the permissible extrusion gap is reached  when the piston or the piston rod touches one side of the cylindrical tube or the guide.

due to the small height of the back up rings and the resulting sensitivity to extrusion, the gap size is limited for all ranges of diameter, pressure and cross section  by the standard  hole/shaft basis fit f8/H8, influences  due to thermal  expansion  have to be considered.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f7
t 0.05

 

d R
≤ 40 max. 0,2
> 40 max. 0,4

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), the seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

at installation, pay attention that the radius on the backup elements fits to the corresponding radius on the sealing element (nonsymmetric backup elements).

 

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

standard tolerance range for piston rods is f8. If a tolerance  range selection is possible f7 should be preferred.

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

 the recommendations  for mounting space heights and cross sections listed below are standard values for the corresponding  O-Ring without

(short), with one (medium) or with two (long) back-up rings.

 

cs [mm]

corresponding O-ring [m]

mounting space height [mm] diameter range [mm]
short medium long static dynamic
1.35 1.78 2.5 3.5 4.5 11 – 99.9 -
2.18 2.62 3.5 5 6.5 100 – 149.9 11 – 19.9
3 3.53 4.4 5.9 7.4 150 – 249.9 20 – 39.9
4.53 5.33 6.7 8.4 10.1 250 – 399.9 40 – 99.9
5.94 6.99 8.8 10.8 12.8 400 – 599.9 100 – 299.9
8.5 10 12.5 15 17.5 >600 300 - 600

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

O-Ring activated symmetric rod seal with sharp-edged sealing lips, good sealing effect for high viscosity fluids, not recommended for new designs .

 

 

 

 

 

  • symmetric single-acting rod compact ring.
  • no interference fit on the outside diameter.
  • sharp-edgedsealing lips for the use in high viscosity media.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • good sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphere.
  • good sealing in all pressure ranges.
  • good static and dynamic sealing.
  • suitable for short travel.
  • no reverse leakage (i.e. minor relative  motion  of the sealing edges when  thedirection is changed).
  • recommended for holding position under pressure.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS 21 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings.
  • as rod seals for switching functions (e.g.clutch operation).
  • as rod seals for clamping seals.
  • replacement for rubber fabric compact seals.

 

note

  • under certain operating conditions, this seal may “pump” via the trailing side, i.e. as it does not fit tightly on the outside diameter, small amounts of operating  media may be pressed out when the seal is deformed  under pressure which may appear to be leak- age.
  • the ratio between nominal width and sealing height cs/H should not drop below  a value  of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).
  • high friction.
  • high break-awaymoment.
  • the recovery capacity is smaller than with simple lip rings.
  • cross-section limited to 20 mm.
  • not suitable for new designs (new  profiles like S03-P, S08-P or S08-PE should be preferred  ).

 

function

RS 21 profiles are lip seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the seal- ing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geom- etry in the software program.

 

operating parameters & material

 

sealing element spring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PTFE virgin 14.310 -200 °C ... +260  °C 15 m/s 100 bar (10 MPa) ++ ++ +
s-mart PTFE  glass 14.310 -200 °C ... +260  °C 15 m/s 160 bar (16 MPa) ++ ++ +
s-mart PTFE bronze 14.310 -200 °C ... +260  °C 15 m/s 160 bar (16 MPa) ++ ++ +
s-mart UHMWPE 14.310 -200 °C ... +80  °C 15 m/s 200 bar (20 MPa) ++ + +

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

note on special materials:

materials such as viton,  silicone, EPDM, H-NBR, etc. can be used for the preload element, but they are only useful in specific cases (temperature or chemi-

cal influences).

 

 

gap dimension

 

operating pressure cs = (ØD - Ød)/2 mm
2 5 7.5 10 12.5 15
safe extrusion gap (mm)
100 bar (10 MPa) 0.18 0.22 0.32 0.38 0.45 0.53
200 bar (20 MPa) 0.12 0.16 0.25 0.33 0.40 0.45
300 bar (30 MPa) 0.07 0.13 0.21 0.28 0.36 0.42
400 bar (40 MPa) 0.05 0.10 0.19 0.26 0.33 0.39

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2 ≤ 0,05-0,3
bottom of groove ≤10 ≤1,6
groove face ≤10 ≤ 1,6

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), the seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
(2) 2 1
(3) 3 1.5
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 the ratio between nominal with and seal height cs/H should not drop below 1/1.25. therefore we recommed the following housing heights.

 

cs = (ØD - Ød)/2 [mm] L [mm]
2 3.5
3 5.1
4 6.5
5 8.8
6 10.2
7.5 12.8
17 10

 

 fitted:

 don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

symmetric rod seal with support ring for simple applications to serve repair purpose, not recommended for new designs (profile RS01 preferred). retainer ring in angled design possible.

 

 

  • symmetric single-acting rod seal.
  • no interference fit on the outside diameter.
  • various materials are available for different purposes.
  • sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • suitable for long travel.
  • little inclination to“stick-slip”.
  • small break-awayload after prolonged periods of standstill.
  • the stabilisation of the sealing element in the housing is achieved  by a retainerring.
  • this retainer ring can be designed straight or as a angled ring (for easier center-ing and installation). the straight design has to be furnished with pressure reliefgrooves, the angled design needs balancing holes (for details see “fabricationtolerances for machined seals”, ES 222.222).

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS 22 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • reciprocating rods on hydraulic cylinders,push rods, fittings and plungers.
  • as rod seals for applications with small extrusion gap and without specific impact load.
  • can also be used as a pivot seal in the case of small loads.
  • repair seal for older equipment.
  • replacement for rubber fabric seals of older equipment.

 

note

  • under certain operating conditions, this seal may “pump” via the trailing side, i.e. as it does not fit tightly on the outside diameter, small amounts of operating  media may be pressed out when the seal is deformed  under pressure which may appear to be leakage.
  • open housings required.

 

function

RS 22  profiles are lip seals designed  to seal pressurised space against the atmosphere;  mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the seal- ing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geom- etry in the software program.

 

operating parameters & material

material back-up ring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PU s-mart POM / s-mart PA2 -30 °C ... +110  °C 0,5 m/s 400 bar (40 MPa) - + +
s-mart HPU s-mart POM / s-mart PA2 -20 °C ... +110  °C 0,5 m/s 400 bar (40 MPa) + + +
s-mart LTPU s-mart POM / s-mart PA2 -50 °C ... +110  °C 0,5 m/s 400 bar (40 MPa) - + +
s-mart SPU s-mart POM / s-mart PA2 -20 °C ... +110  °C 0,7 m/s 400 bar (40 MPa) + + +
s-mart GPU s-mart POM / s-mart PA2 -30 °C ... +100  °C 0,5 m/s 400 bar (40 MPa) + + +

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

 

 

gap dimension

operating pressure cs = (ØD - Ød)/2 mm
4 5 7.5 10 12.5 15
safe extrusion gap (mm)
100 bar (10 MPa) 0.18 0.22 0.32 0.38 0.45 0.53
200 bar (20 MPa) 0.12 0.16 0.25 0.33 0.40 0.45
0.07 0.13 0.21 0.28 0.36 0.42 0.25
400 bar (40 MPa) 0.05 0.10 0.19 0.26 0.33 0.39

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the diagram applies to an operating temperature  of 70 °C.

use larger cross sections to increase maximum allowed gap dimension.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10


mode of installation

open housings are required.

 

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

the ratio between nominal with and seal height cs/H should not drop below 1/1.25. therefore we recommed the following housing heights.

 

cs = (ØD - Ød)/2 [mm] L [mm]
8 4
9 5
11 6
14 7.5
17 10
20 12.5
25 15
32 20

 

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

optimized for high pressure, equal angled chevron design suitable for high pressure range. external spring pretension necessary. mainly used in chemical, pharma and food industry.

 

 

 

 

 

  • symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
  • the sealing function originates from the contact force applied by a spring, wear is compensated (for required spring force see “mode of installation”).
  • various materials are available for different purposes.
  • good sealing in the lower pressure range.
  • for pressures up to 315 bar as a seal between pressurised space and atmosphere.
  • good static and dynamic sealing.
  • suitable for short and long travel.
  • wear resistance is depending on material combina
  • open mounting space required (see mode of installation).
  • the sealing packing can be used both as a rod seal and single-acting piston seal.
  • by varying the material, operation conditions can be adapted.
  • by varying the number of packings, friction as well as leakage behavior can beinfluenced.

 

application

 

 not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

the RS 2931 seal is designed for use as a rod seal.

 

area of application: hydraulics

  • valves and pumps in corrosive environment.
  • chemical, pharma, and food industry.
  • high temperature applications up to 200°C.
  • slight pivoting or spiral movement allowable.

 

note

  • expensive and complex desig
  • the hardness of the sliding surface should reach a minimum of 25 to 65 HRC, otherwise a damage of the sliding surface is possible(attention: acid-resistant steels do not always reach such hardness).
  • if no “dead spot” is allowed in the sealing system (e.g.: food industry), the spring can be installed on the not pressurised side as well.

the spring tension then has to be increased by the value of the axial force, resulting from pressurisation (see “mode of installation”). in

this case the support ring has to be furnished with pressure relief grooves.

 

function

RS 2931 seal  profiles are single-acting rod seal sets designed to seal pressurized space against the atmosphere; mainly for reciprocating move- ments. the design is based on application in aggressive media or with high thermal demands.

the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

 

 

operating parameters & material

material temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
header ring S29-F sealing element S30-F back-up ring S31-F
s-mart PTFE glass s-mart PTFE virgin s-mart PTFE glass -200 °C ... +260  °C 0,5 m/s 315 bar (31.5 MPa) ++ ++ O

 

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                            o ... conditional suitable

+ ... suitable                                            - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

 

gap dimension

the size of the permissible gap on the side opposite the pressure source depends mainly on the seal material and the design of the seal. if the permissible gap dimensions are exceeded, there will be extrusion wear on the side opposite the pressure source which may make the seal unfit for usage. the maximum value of the permissible extrusion gap is reached when the piston or the piston rod touches one side of the cylindrical tube or guide. using this seal set free of defects should include extrusion gap sizes with the same tolerance range as the guiding.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3


tolerance recommendation
 

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

at first insert spring into housing. as far as possible, a metallic plate should be placed between spring and seal set in order to ensure a evenly dis- tributed contact pressure. pressure relief has to be provided. afterwards insert the male ring, then the packing and finally the pressure ring (well greased) into the installation space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes). finally tighten the metal insert to nominal height.

 

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

 

 

 

insertion chamfer:

in order to avoid damage to the rod seal during installation, the piston rod is to be chamfered and rounded as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

nominal width, mounting space height, cross section, diameter range and pressure should be in accordance with following recommendations:

the stated number of chevrons depends on the pressure range and is only valid for PTFE. filled PTFE series can allow lower numbers of chevron.

Ød [mm] ØD [mm] L [mm] cs = (ØD - Ød)/2 [mm]
10 - 39,9 ød + 10 16 5
40 - 74,9 ød + 15 25 7.5
75 - 149,9 ød + 20 32 10
150 - 199,9 ød + 25 40 12.5
200 - 300 ød + 30 50 15
> 300 ød + 40 63 20

 

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

chevron set, design with extremely flexible sealing lips for difficult operating condi- tions (bad guiding, large tolerance range). available as total chevron set as well as intermediate chevrons only (in case of metal male and female adaptors).

 

 

 

 

  • asymmetric single-acting rod sealing set consisting of several chevrons, com- bined with pressure and support ring to form a set. pressure and support ring are mainly made of metal or already integrated in metal housing.
  • various materials are available for different purposes.
  • good sealing in the higher pressure range.
  • for pressures up to 500 bar as a seal between pressurised space and atmosphere.
  • good static and very good dynamic sealing.
  • suitable especially for very long travel.
  • low friction due to flexible lip design.
  • open, preferable adjustable mounting space required (see mode of installation).
  • by varying the number of packings,friction as well as leakage behavior can beinfluenced (at least 2 chevrons).
  • mainly used for repair purposes.use more modern systems for new designs.
  • the long,flexible lip can compensate guide clearance (e.g.: on long strokes).
  • due to the low contact pressure on the sealing lip surface,the piston can moveback easily.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

the RS 32 seal is designed  for use as a rod seal.

 

area of application: hydraulics

  • linearly acting rods on hydraulic cylinders; plunger in down and upstroke presses.
  • spindle seal at valves (at fittings).
  • cylinders with very long strokes,e.g. lifting ramps or hydraulic elevators.

 

note

  • expensive and complex design.
  • former designs mainly made in fabric reinforced rubber.replacing such fabric reinforced rubber seals by polyurethane  seals will

reduce the lubricating film (attention in case of more sealing rings).

  • reworked housings (changed cross-section) require adapted pressure and support rings made of plastic. if this is not possible (if pres-

sure and support rings are integrated  in the housing), it is recommended to consult our technical department for clarification.

 

Function

RS 32  profiles are single-acting rod seal sets designed  to seal pressurized space against the atmosphere;  mainly for reciprocating move- ments. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

material back-up ring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PU s-mart POM / s-mart PA2 -30 °C ... +100  °C 0,5 m/s 500 bar (50 MPa) - + +
s-mart HPU s-mart POM / s-mart PA2 -20 °C ... +100  °C 0,5 m/s 500 bar (50 MPa) + + +
s-mart LTPU s-mart POM / s-mart PA2 -40 °C ... +100  °C 0,5 m/s 500 bar (50 MPa) - + +
s-mart SPU s-mart POM / s-mart PA2 -20 °C ... +100  °C 0,7 m/s 500 bar (50 MPa) + + +
s-mart CPU s-mart POM / s-mart PA2 -30 °C ... +100  °C 0,5 m/s 500 bar (50 MPa) + + +

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials in other systems are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding  speeds another system should be used (e.g. PTFE materials).

 

gap dimension

when using a pressure ring, the extrusion gap is already integrated  in the seal. the gap between piston rod and housing should not exceed cs·0.05.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

 

mode of installation

insert the male ring first, then the packing  and finally the pressure ring (well greased)  into the installation  space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes). finally tighten the metal insert to nominal height.

 

recommended mounting space:

the adjustment range of the mounting space height (L) should correspond to approx. 10% of the theoretical mounting length.

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 this profile is only a replacement in already existing housings. use new sealing systems in new designs. the nominal width and seal diameter should be in accordance with following recommendations:

cs = (ØD - Ød)/2 [mm] L [mm]
8 4
9 5
11 6
14 7.5
17 10
20 12.5
25 15
32 20

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

 

description

compact rod seal with almost no dead spots as required for applications in food and pharma industry, also commonly  used as O-Ring replacement, because design with interference fit on outside diameter maintains non-twisting in dynamic applications.

 

 

 

  • asymmetric double-acting rod compact seal. the preload is achieved by the inter- nal stress of the seal material.
  • interference fit on the outside diameter.
  • various materials are available for different purposes.
  • snaps into simple grooves (see notes on installation).
  • good sealing effect across a wide temperature range.
  • for pressures up to 400 bar as a seal between pressurised space and atmosphereor between pressurised spaces.
  • good sealing in the low pressure range.
  • excellent static sealing.
  • only few dead spots.
  • the housing grooves are same as housing grooves for O-rings(see “range ofprofile sizes”)
  • no twisting in dynamic applications.
  • space-saving design.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

double acting

the RS35 seal is designed  for use as a piston seal.

 

area of application: hydraulics

  • static and dynamic seals in hydraulic systems.
  • use in systems with O-ringgrooves instead of O-rings in case of stability problems (twisting) or “pumping”.
  • for food and pharma applications or as a valve seal.

 

note

  • decreasing preload in rotary applications  is necessary because of high friction.
  • a design in rubber materials is not recommendable because of the geometry (use S20-R).

 

function

S35-P profiles are compact  seals designed  to seal pressurised space against the atmosphere or between pressurised spaces mainly for re- ciprocating movements, but for slight rotations as well. the design is based on application  in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

 

operating parameters & material

 

diameter range: up to 600 mm

 

 

the stated operation conditions represent general indications. it is recommended not to use all maximum  values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable                         o ... conditional suitable

+ ... suitable                                         - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials in other sealing systems are to be preferred, attention  should be paid to restrictions for pressure range and wear resistance. for higher gliding speeds another system should be used (e.g. PTFE materials).

 

 

gap dimension

material back-up ring temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
s-mart PU s-mart POM / s-mart PA2 -30 °C ... +110  °C 0,4 m/s 400 bar (40 MPa) - + ++
s-mart HPU s-mart POM / s-mart PA2 -20 °C ... +110  °C 0,4 m/s 400 bar (40 MPa) ++ + ++
s-mart LTPU s-mart POM / s-mart PA2 -50 °C ... +110  °C 0,4 m/s 400 bar (40 MPa) - + ++
s-mart SPU s-mart POM / s-mart PA2 -20 °C ... +110  °C 0,5 m/s 400 bar (40 MPa) ++ ++ ++
s-mart CPU s-mart POM / s-mart PA2 -30 °C ... +100  °C 0,4 m/s 400 bar (40 MPa) ++ + ++

 

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the table applies to an operating temperature  of 70 °C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤2,5 ≤0,1-0,5
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

for inside diameters of 25 mm or more, and dependant  on the radial cross section (cs), the seal can be snapped into the housing.

Ød type of installation
≤ 6•cs open mounting space required
> 6•cs .....≤ 10•cs snap mounting with tool
> 10•cs snap mounting by hand

 

recommended mounting space:

 

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations  for D1 (=inside diameter of the guiding elements):

d f8 [mm]

p ≤ 100 [bar]

100 < p ≤ 200 [bar]

p > 200 [bar]

≤ 100 H10 H8 H8
> 100 ≤ 200 H10 H8 H7
>200 H9 H8 H7

 

insertion chamfer:

in order to avoid damage  to the rod seal during installation, the piston rod is to be chamfered  and rounded  as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm) c (mm)
α = 15⁰  ... 20⁰ α = 20⁰  ... 30⁰
4 3.5 2
5 4 2.5
6 4.5 3
7.5 5 4
10 6 5
12.5 8.5 6.5
15 10 7.5
20 13 10

 

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars  catalog...

 we recommed the following values for cross sections and housing heights in accordance to the diameter  range:

 

Ød [mm] cs = (ØD - Ød)/2 [mm] L [mm]
5 – 9.9 2.5 4
10 – 24.9 3 4.5
25 – 49.9 4 5.5
50 – 99.9 5 6.5
100 – 149.9 7.5 9.5
150 – 299.9 10 12.5
300 – 499.9 12.5 15
500 – 700 15 17.5
>700 20 22

 

 

fitted:

 don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.