description

wiper seal with Polyamide (PA) material.

 

application

 

 

 

category of profile

machined or molded/standard/trade product.

 

single acting

 

operating parameters & material

 

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.

 

surface quality

surface roughness Ra (μm)
sliding surface according to seal data
bottom of groove ≤ 2.5
groove face ≤ 4.0

 

tolerance recommendation

seal housing tolerances
D H10

 

 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

two-piece double wiper consisting of dynamic wiper ring and a static O-ring.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

 

area of application: hydraulics

hydraulic  systems, reciprocal movements, medium dirt load.

 

function:

the WR 13 is a double function wiper with a sharp wiping edge, a sealing lip on the medium side and an O-ring as a energizing element. this double function consists of wiping the dirt from the surface of the descending piston rod on the one hand and on the other, that the remaining oil film is retained and returned to the system with the next descent. the high wear resistance of the polyurethane provides this wiper with a particularly long service life.

 

media

hydraulic  oils acc. to DIN 51524/51525, lubricating  oils, other mineral oil based fluids  and HFA, HFB, HFC highly non-flammable hydraulic fluids acc. to VDMA 24317.

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.

 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their housings when distorted into a kidney shape (over 20mm diameter). a large insertion chamfer must be provided (20-30°, length= (D-d)/4).

 

surface quality

surface roughness Rtmax (μm) Ra (μm)
sliding surface according to seal data
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
L +0,2
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

two-piece double wiper consisting of dynamic wiper ring and a static O-ring.

 

application

 

 

 

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

 

single acting

 

area of application: hydraulics

hydraulic  systems, reciprocal movements, medium dirt load.

 

function:

the WR 13-E2 is a double  function wiper with a sharp wiping edge, a sealing lip on the medium side and an O-ring as a energizing element. this double function consists of wiping the dirt from the surface of the descending piston rod on the one hand and on the other, that the remaining oil film is retained and returned to the system with the next descent. the special shape of this wiper makes it very robust. due to the very good slide properties of PTFE, it is applied for short strokes, high stroke speed and frequency. it is not suitable for use with an extreme dirt load.

 

media

hydraulic  oils acc. to DIN 51524/51525, lubricating  oils, other mineral oil based fluids  and HFA, HFB, HFC highly non-flammable hydraulic fluids acc. to VDMA 24317.

 

operating parameters & material

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.

 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their housings when distorted into a kidney shape (over 20mm diameter). a large insertion chamfer must be provided (20-30°, length= (D-d)/4).

 

surface quality

surface roughness Rtmax (μm) Ra (μm)
sliding surface according to seal data
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
L +0,2
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

PTFE-wiper with O-ring as preloading element. PTFE part takes over wiping function, O-ring maintains equal contact pressure. good dry running properties, no “stick-slip”. excellent chemical and thermal resistance (depends on O-ring ).

 

 

 

 

 

  • the seal profile and close machining tolerances provide a good static seal for the outside diameter, assisting in the prevention of ingress of humidity and foreign matter via the outside diameter.
  • the wiping part consists of PTFE with fillers selected to suit the respective appli- cation, and an O-ring as a preload element. the PTFE part takes over the wiping function, the O-ring maintains even contact pressure.
  • the design of the wiping edge aids recovery of the residual oil film; any dirt is wiped off reliably.
  • pressure build-up on the trailing side is to be avoided if possible.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

single acting

 

area of application: hydraulics/pneumatics

  • reciprocating, swiveling and coiling rods on hydraulic cylinders.
  • push rods and valve stems.
  • (materials must be selected according to operating requirements).

 

advantages:

  • small installation grooves.
  • minimal break-out and dynamic sliding friction. therefore no stick-slip. steady movement is guaranteed even at low velocities.
  • excellent sliding properties.
  • high wear resistance, therefore long service life.
  • available in diameters up to 2000 mm.

 

function:

WR 14 wipers are designed to keep dust, dirt, sand and metal chips from the sealing and guiding elements, thereby abrasive damage caused by external contamination.

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, polyurethan materials increase wear resistance.

surface quality

surface roughness Rtmax (μm) Ra (μm)
sliding surface according to seal data
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
L +0,2
ØD H9


 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their housings when distorted into a kidney shape (over 20mm diameter). a large insertion chamfer must be provided (20-30°, length = (D-d)/4).

 

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...

recommended rod Ød range L [mm] ØD ØD1 R max O-ring cross-section
<
6 12 3.7 Ød + 4,8 Ø d +2,7 0.4 1,78
12 65 5 Ød + 6,8 Ø d +3,5 0,4 2.62
65 250 6 Ød + 8,8 Ø d +4,0 0,4 3.53
250 420 8.4 Ød + 12,2 Ø d +4,5 0,4 5.33
420 650 11 Ød + 16 Ø d +5,2 0,4 6.99
650 1000 14 Ød + 20 Ø d +6,6 0,4 8.4

 

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

PTFE-double wiper with two O-rings as preloading elements. wiping edge assures a reliable protection against penetration of dust and dirt. additional sealing lip for reduction of residual oil film if used in combination with O-ring activated PTFE seals type S09 (tandem).  excellent chemical and thermal resistance (depends on O-ring ).

 

 

 

  • the seal profile and close machining tolerances provide a good static seal for the outside diameter, assisting in the prevention of ingress of humidity and foreign matter via the outside diameter.
  • the wiping part consists of PTFE with fillers, selected to suit the respective appli- cation, and two O-rings as preload elements. the PTFE part takes over the wiping function, the O-rings maintain even contact pressure.
  • the design of the wiping edge aids recovery of the residual oil film; any dirt is wiped off reliably.
  • in addition, the sealing edge reduces the residual oil film on the side of the me- dium if composite seals on PTFE basis, (e.g. S09), are used (tandem arrangement). in the standard design, pressurisation should be limited to 16 bar.

 

application

 

 

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

double acting

 

  • the seal profile and close machining tolerances provide a good static seal for the outside diameter, assisting in the prevention of ingress of humidity and foreign matter via the outside diameter.
  • the wiping part consists of PTFE with fillers, selected to suit the respective appli- cation, and two O-rings as preload elements. the PTFE part takes over the wiping function, the O-rings maintain even contact pressure.
  • the design of the wiping edge aids recovery of the residual oil film; any dirt is wiped off reliably.
  • in addition, the sealing edge reduces the residual oil film on the side of the me- dium if composite seals on PTFE basis, (e.g. S09), are used (tandem arrangement). in the standard design, pressurisation should be limited to 16 bar.

 

 

area of application: hydraulics/pneumatics

  • reciprocating, swivelling and coiling rods on hydraulic cylinders.
  • push rods and valve stems.
  • (materials must be selected according to operating requirements).
  • industrial vehicles, injection moulding machines, handling equipment, presses, agricultural machinery, mills, control and regulation equipment, large cylinders.

 

function:

WR 15 wipers are designed to keep dust, dirt, sand and metal chips from the sealing and guiding elements, thereby avoiding abrasive dam- age caused by external contamination.

 for detailed information regarding chemical resistance please refer to our “list of resistance”.

 

surface quality

surface roughness Rtmax (μm) Ra (μm)
sliding surface according to seal data
bottom of groove ≤6,3 ≤1,6
groove face ≤15 ≤3

 

tolerance recommendation

seal housing tolerances
L +0,2
ØD H9

 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their housings when distorted into a kidney shape (over 20mm diameter). a large insertion chamfer must be provided (20-30°, length = (D-d)/4).

 

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

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.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

double acting

the RS09-A 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 0.25 0.28 0.33 0.37 0.43 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 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 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 + 4,9 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 RS 09-A.

 

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 RS 09-B 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 RS 09-B. 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 max-surface speed max-pressure hydrolysis dry running wear resistance
PTFE glas  NBR (70 shore A) -30 °C ... +100  °C 10 m/s

400 bar (40 MPa)

800 bar (80 MPa)3

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

 

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 RS 09-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 RS 09-C) 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 RS 09-C (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:

 

  secondary seal secondary seal
version 1 S09-E S09-P
version 2 S09-P -

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 RS 09-D 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 max-surface speed max-pressure
sealing element energizer
 PTFE bronze  NBR -30˚C … + 100˚C 15 m/s 350 bar (350 MPa)
 TNBR  -45˚C … + 80˚C 15 m/s 350 bar (350 MPa)
 FKM -10˚C … + 200˚C 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.

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 RS09-FI consisting of profile ring and O-ring as a preload  component

 

application

 

category of profile

machined or molded/standard/trade product.

 

double acting

the RS09-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 max-surface speed max-pressure
sealing element energizer
 PTFE bronze  NBR (70 shore A) -30 °C ... +100 °C 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 RS10-12 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 RS10-12 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

RS10-12 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

material temperature max. surface speed max. pressure 1 hydrolysis dry running wear resistance
header ring RS10-A sealing element RS11-A back-up ring RS12-M
POM / PA2 PU POM / PA2 -30 °C ... +100 °C 0,5 m/s 500 bar (50 MPa) - + +
POM / PA2 HPU POM / PA2 -20 °C ... +100 °C 0,5 m/s 500 bar (50 MPa) + + +
POM / PA2 LTPU POM / PA2 -40 °C ... +100 °C 0,5 m/s 500 bar (50 MPa) - + +
POM / PA2  SPU POM / PA2 -20 °C ... +100 °C 0,7 m/s 500 bar (50 MPa) + + +
POM / PA2  CPU POM / PA2 -30 °C ... +100 °C 0,5 m/s 500 bar (50 MPa) + + +
PTFE glass  NBR PTFE glass -30 °C ... +100 °C 0,5 m/s 500 bar (50 MPa) - - O
 PTFE glass FKM PTFE glass -20 °C ... +200 °C 0,5 m/s 500 bar (50 MPa) - - O
PTFE glass EPDM PTFE glass -50 °C ... +150 °C 0,5 m/s 500 bar (50 MPa) ++ - O
PTFE glass  HNBR PTFE glass -25 °C ... +150 °C 0,5 m/s 500 bar (50 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 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

material temperature °C max. surface speed max. pressure 1 hydrolysis dry running wear resistance
header ring RS10-A sealing RS11-A back-up ring RS12-M
POM /PA PU POM /PA -30 °C ... +100 0,5 m/s 500 bar (50 MPa) - + +
POM /PA HPU POM /PA -20 °C ... +100 0,5 m/s 500 bar (50 MPa) + + +
POM /PA  LTPU POM /PA -40 °C ... +100 0,5 m/s 500 bar (50 MPa) - + +
POM /PA  SPU POM /PA -20 °C ... +100 0,7 m/s 500 bar (50 MPa) + + +
POM /PA CPU POM /PA -30 °C ... +100 0,5 m/s 500 bar (50 MPa) + + +
 PTFE glass  NBR  PTFE glass -30 °C ... +100 0,5 m/s 500 bar (50 MPa) - - O
 PTFE glass  FKM PTFE glass -20 °C ... +200 0,5 m/s 500 bar (50 MPa) - - O
 PTFE glass  EPDM PTFE glass -50 °C ... +150 0,5 m/s 500 bar (50 MPa) ++ - O
PTFE glass  HNBR  PTFE glass -25 °C ... +150 0,5 m/s 500 bar (50 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 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

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
PTFE virgin 14.310 -200 °C ... +260 °C 15 m/s 100 bar (10 MPa) ++ ++ +
PTFE glass 14.310 -200 °C ... +260 °C 15 m/s 160 bar (16 MPa) ++ ++ +
PTFE bronze 14.310 -200 °C ... +260 °C 15 m/s 160 bar (16 MPa) ++ ++ +
 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 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

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 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

most common guide ring for rod or piston application. used in many standard cylin- ders, majority of applications require split version for installation into closed housings, non split design available (bushings).

application
 

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

 

advantages

as a non-metallic guide element for pistons & rods, for standardised housings, amongst others, according to ISO 10766

  • no seizure due to metal/plastic materials combina
  • medium load-bearing capacity.
  • chamfered profile edges prevent pressing of edge into the corner radii of the housing groove.
  • simple snap-in fitting.

 

application

earth moving equipment, industrial vehicles, agricultural machinery, cranes.

 

 

operating parameters & material

 

material temperature max. surface speed max. specific load
 POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
 PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
 PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
 PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H9

 

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

 

manufacturing tolerance

ØD

production tolerance profie thickness
piston guide ring rod guide ring
≤ 120 –0,1

–0,1

> 120 –0,15

 

fitting & installation

Guide Ring F01 can be easily snapped into the housing groove. careful fitting is a prerequisite for correct function.

 

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

for piston application. angled design combines guidering and back-up ring function. split and non split design available.

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined product only.

 

operating parameters & material

material temperature max. surface speed max. specific load
 POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
 PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
 PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød h10
Ød1 h8
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

as profile BWR 04 but for rod application

 

application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined product only.

 

operating parameters & material

material temperature max. surface speed max. specific load
 POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød h10
Ød1 h8
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

with integrated collar on inside diameter, for piston application. split and non split design available.

they are easy to install, extremely durable and allow simple piston designs. although these rings are produced in a large range of diameters, intermediate sizes can be cut additionally from the next largest dimension.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined product only.

 

operating parameters & material

material temperature max. surface speed max. specific load
 POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
 PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
 PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød h10
Ød1 h8
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

with integrated collar on outside diameter, for rod application. split and non split design available.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined product only.

 

operating parameters & material

material temperature max. surface speed max. specific load
POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
 PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød h10
Ød1 h8
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

with groove on inside diameter, for piston application. split and non split design avail- able.

the guide ring type BWR 07 is mainly used on pistons. it provides guiding and bearing sur- faces between piston and cylinder tube and prevents metal to metal contact between them.

the BWR 07 consists of an extremely abrasion-resistant and low-friction POM-PTFE-Bronze compound and other materials. it can be used for hydraulic oil with a mineral oil base, for water-oil emulsions and for fire-resistant fluids as well as compressed air.

it has a U-shaped cross-section and is split with an angled butt joint. it can be easily expanded for fitting into corresponding installation grooves on the piston. the U- shaped groove arrangement secures the bearing against axial movement.

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined product only.

 

operating parameters & material

material temperature max. surface speed max. specific load
 POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
 PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
 PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød h10
Ød1 h8
ØD H9

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤1,5 0,3 - 0,5
bottom of groove ≤6,3 0.8
groove face ≤15 ≤3.2

 

fitting & installation

split bearing ring F07 to be snapped onto the piston.

 

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

with groove on outside diameter, for rod application. split and non split design avail- able.

guide ring type BWR 08 is mainly used on piston rods. it provides guiding and bearing surfaces between rod and housing and prevents metal to metal contact between them.

 

the BWR 08  consists of an extremely abrasion-resistant and low-friction POM-PTFE Bronze compound & other material. it can be used for hydraulic oil with a mineral oil base, for water-oil emulsions and for fire-resistant fluids as well as compressed air.

 

it has a U-shaped cross-section and is split with an angled butt joint. it can be spirally compressed inwards for fitting into the rod housing where it springs back out into corresponding installation grooves. the bearing groove arrangement secures it against axial movement.

 application

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined product only.

 

operating parameters & material

material temperature max. surface speed max. specific load
POM -50 °C ... +100 °C 4,0 m/s 25 N/mm2
PA -40 °C ... +100 °C 4,0 m/s 25 N/mm2
PTFE glass -200 °C ... +200 °C 4,0 m/s 3 N/mm2
 PTFE bronze -200 °C ... +200 °C 5,0 m/s 4,5 N/mm2
Phenolic Resin -40 °C ... +130 °C 1,0 m/s 90 N/mm2

 

 

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.

2 POM up to ø260 mm, PA above ø260 mm

 

tolerance recommendation

seal housing tolerances
Ød h10
Ød1 h8
ØD H9

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface ≤1,5 0,3 - 0,5
bottom of groove ≤6,3 0.8
groove face ≤15 ≤3.2

 

fitting & installation

the split guide ring F08 is compressed spirally and can be snapped easily into corresponding grooves in the cylinder head.

 

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

back-up rings have no intended sealing function. instead, as their name indicates, they are protective and supporting elements made from extrusion-resistant materials which generally have a rectangular cross section. they are installed in a groove together with an elastomeric sealing element preferably with a corresponding o-ring in static appli- cations.

due to the tight fit of the back-up ring in the housing, they prevent extrusion of the pressurised elastomeric sealing element into the sealing gap common inactive back- up ring, mainly used with o-ring to avoid gap extrusion. split and non split design avail- able.

slit bearing component with rectangular cross-section for ISC o-ring sealing on the out- side & inside.

 application

 

category of profile

machined or molded/standard/trade product.

applications

bearing element to prevent gap extrusion of radial sealing ISC o-ring used dynamically.

  • injection moulding machines.
  • machine tools.
  • presses.
  • excavators.
  • agricultural machines.
  • valves for hydraulic circuits.

 advantages

  • use of o-ring in high pressure applications.
  • use of o-ring materials with a low hardness.
  • compensation of radial sealing gaps.
  • use for internal and external sealing applications.
  • reciprocating and rotating movements possible.
  • compensation for large temperature fluctuations.
  • static and dynamic applications.
  • enlargement of the operating conditions of o-ring.
  • high material and product quality.
  • wide selection of standard dimensions.

 external sealing (bore)

back-up ring types, uncut

  • rectangular cross sec
  • static and dynamic use.
  • reciprocating and rotating movements possible.

 back-up ring types, cut

  • rectangular cross sec
  • cut angle of 30° or 45°.
  • static and dynamic use.
  • reciprocating and rotating movements possible.
  • preferred for installations in a closed groove where uncut back-up rings are not suitable.

 internal sealing (rod)

back-up ring types, uncut

  • rectangular cross sec
  • static and dynamic use.
  • reciprocating and rotating movements possible.

 back-up ring types, cut

  • rectangular cross sec
  • cut angle of 30° or 45°.
  • static and dynamic use.
  • reciprocating and rotating movement possible.
  • preferred for installations in closed grooves where uncut back-up rings are not suitable.

 operating parameters & material

material temperature
POM -50 °C ... +100 °C
 PA -40 °C ... +100 °C
 PTFE virgin -200 °C ... +260 °C
PTFE glass -200 °C ... +260 °C
 PTFE bronze -200 °C ... +260 °C
PTFE carbon -200 °C ... +260 °C
 PU -30 °C ... +110 °C
 HPU -20 °C ... +110 °C
 LTPU -50 °C ... +110 °C
 GPU -30 °C ... +110 °C
NBR -30 °C ... +100 °C
 FKM -20 °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.

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

 

tolerance recommendation

surface finish according to o-ring instructions

seal housing tolerances
Ød f7
ØD H9

 

the location of the sealing surface is determinant for the functionality

seal housing tolerances
Ød f9
ØD H8



design instructions

the recommendations for o-ring (see catalogue “o-ring“) are generally valid for the use of back-up rings. this applies to the groove design, sur- face roughness, lead-in chamfers, etc.

when the pressure is applied from one side only, it is sufficient to install a back-up ring on the downstream side of the o-ring. when the seal is exposed to pressure from both sides, two back-up rings -one on each side of the o-ring have to be used.

 

permissible sealing gap

the use of back-up rings allows the service pressure and/or permissible sealing gap specified in our o-ring catalogue to be increased. back-up ring installation, depending on the direction of the pressure.(see figure below).

 

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...

 

installation recommendations static & dynamic application

external sealing (bore), back-up ring types, uncut & cut, r max 0,2mm

internal sealing (rod), back-up ring types, uncut & cut, r max 0,2mm

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

back-up rings have no intended sealing function. instead, as their name indicates, they are protective and supporting elements made from extrusion-resistant materials which generally have a rectangular cross section. they are installed in a groove together with an elastomeric sealing element preferably with a corresponding o-ring in static appli- cations.

due to the tight fit of the back-up ring in the housing, they prevent extrusion of the pressurised elastomeric sealing element into the sealing gap common inactive back- up ring, mainly used with o-ring to avoid gap extrusion. split and non split design avail- able.

slit bearing component with rectangular cross-section for ISC o-ring sealing on the out- side & inside.

 

application

category of profile

machined or molded/standard/trade product.

applications

bearing element to prevent gap extrusion of radial sealing ISC o-ring used dynamically.

  • injection moulding machines.
  • machine tools.
  • presses.
  • excavators.
  • agricultural machines.
  • valves for hydraulic circuits.

 

advantages

  • use of o-ring in high pressure applications.
  • use of o-ring materials with a low hardness.
  • compensation of radial sealing gaps.
  • use for internal and external sealing applications.
  • reciprocating and rotating movements possible.
  • compensation for large temperature fluctuations.
  • static and dynamic applications.
  • enlargement of the operating conditions of o-ring.
  • high material and product quality.
  • wide selection of standard dimensions.

 

external sealing (bore)

back-up ring types, uncut

  • rectangular cross sec
  • static and dynamic use.
  • reciprocating and rotating movements possible.

 

back-up ring types, cut

  • rectangular cross sec
  • cut angle of 30° or 45°.
  • static and dynamic use.
  • reciprocating and rotating movements possible.
  • preferred for installations in a closed groove where uncut back-up rings are not suitable.

 

internal sealing (rod)

back-up ring types, uncut

  • rectangular cross sec
  • static and dynamic use.
  • reciprocating and rotating movements possible.

 

back-up ring types, cut

  • rectangular cross sec
  • cut angle of 30° or 45°.
  • static and dynamic use.
  • reciprocating and rotating movement possible.
  • preferred for installations in closed grooves where uncut back-up rings are not suitable.

 

operating parameters & material

material temperature
 POM -50 °C ... +100 °C
 PA -40 °C ... +100 °C
PTFE virgin -200 °C ... +260 °C
 PTFE glass -200 °C ... +260 °C
 PTFE bronze -200 °C ... +260 °C
 PTFE carbon -200 °C ... +260 °C
 PU -30 °C ... +110 °C
 HPU -20 °C ... +110 °C
LTPU -50 °C ... +110 °C
 GPU -30 °C ... +110 °C
 NBR -30 °C ... +100 °C
 FKM -20 °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.

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

 

tolerance recommendation

surface finish according to o-ring instructions

seal housing tolerances
Ød f7
ØD H9

 

the location of the sealing surface is determinant for the functionality

seal housing tolerances
Ød f9
ØD H8



design instructions

the recommendations for o-ring (see catalogue “o-ring“) are generally valid for the use of back-up rings. this applies to the groove design, sur- face roughness, lead-in chamfers, etc.

when the pressure is applied from one side only, it is sufficient to install a back-up ring on the downstream side of the o-ring. when the seal is exposed to pressure from both sides, two back-up rings -one on each side of the o-ring have to be used.

 

permissible sealing gap

the use of back-up rings allows the service pressure and/or permissible sealing gap specified in our o-ring catalogue to be increased. back-up ring installation, depending on the direction of the pressure.(see figure below).

 

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...

 

installation recommendations static & dynamic application

external sealing (bore), back-up ring types, uncut & cut, r max 0,2mm

internal sealing (rod), back-up ring types, uncut & cut, r max 0,2mm

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

standard active back-up ring for piston seal type PD. normally already included in seal profiles, designed for automatic pressure activation. split and non split design available.

 

application

 

category of profile

machined only.

 

operating parameters & material

material temperature
POM2 -50 °C ... +100 °C
 PA -40 °C ... +100 °C
PTFE glass -200 °C ... +260 °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.

2 POM up to ø260 mm, PA above ø260 mm

 

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...

 tolerance value and surface finish according to corresponding seal data sheet

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

standard active back-up ring for piston seal type PD. normally already included in seal profiles, designed for automatic pressure activation. split and non split design available.

 

application

category of profile

machined only.

 

operating parameters & material

material temperature
POM -50 °C ... +100 °C
PA -40 °C ... +100 °C
PTFE glass -200 °C ... +260 °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.

2 POM up to ø260 mm, PA above ø260 mm

 

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...

tolerance value and surface finish according to corresponding seal data sheet

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

standard active back-up ring for piston seal type PD. normally already included in seal profiles, designed for automatic pressure activation. split and non split design available.

 

application

category of profile

machined only.

 

operating parameters & material

material temperature
 POM -50 °C ... +100 °C
 PA -40 °C ... +100 °C
PTFE glass -200 °C ... +260 °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.

2 POM up to ø260 mm, PA above ø260 mm

 

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...

tolerance value and surface finish according to corresponding seal data sheet

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

standard active back-up ring for piston seal type PD. normally already included in seal profiles, designed for automatic pressure activation. split and non split design available.

 

application

category of profile

machined only.

 

operating parameters & material

material temperature
 POM2 -50 °C ... +100 °C
 PA -40 °C ... +100 °C
 PTFE glass -200 °C ... +260 °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.

2 POM up to ø260 mm, PA above ø260 mm

 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...

tolerance value and surface finish according to corresponding seal data sheet

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.