description

as profile WR 01, but without back support area. for housings according ISO 6195 - Type A.

 

  • 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 design of the wiping lip, with its extremely rounded outline, aids to maintain the initial lubricating 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: pneumatics

  • reciprocating rods on pneumatic cylinders.
  • push rods and valve stems.
  • (materials must be selected according to operating requirements).
  • the profile is not suited for mounting space according to ISO 6195-1986 type A. Design

 

function

WR 01 pneumatic  wipers are designed to keep dust, dirt, sand and metal chips away from the sealing and guiding elements, thereby avoid- ing abrasive damage caused by external contamination.

 

operating parameters

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

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 < 10 mm 0.2
L ≥ 10 mm 0.3
D1 H11
D H11

 

cs R [mm]
≤ 5 max. 0,3
>5.......≤ 7,5 max. 0,4
>7,5....≤ 10 max. 0,6
> 10 max. 0,8

 

 

the L1 measurement, which is dependent on the height of the wiper, is selected as follows:

H [mm] L1 [mm]
≤ 7 1
10 1.5

 

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). when mounted in cylinders that cannot be dismantled, the rings can also be cut open. in such cases, an approx. 2-3% larger diameter should be chosen.

when the wiper is installed, the two ends are snapped into place first, and then the entire ring is pressed in along the entire circumference. no gluing of the joining ends is required.

 

 

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...

 not suitable for wiper housings according to ISO 6195/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

wiper to fit in angled housings (30°angle). design mainly used in british equipment, in inch as well as metric  dimensions.

 

  • no special holding systems are required for installation. the rings snap into grooves and do not require a precision fit.
  • the design of the wiping edge aids recovery of the residual oil film; any dirt is wiped off reliably.
  • this design is used in english machines in particular and is common in both imperial and metric dimensions.
  • special housing designs required (angel on groove face= 30°).
  • 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 only.

 

single acting

 

area of application: hydraulics

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

 

function

WR 04-B wipers are designed to keep dust, dirt, sand and metal chips away from the sealing and guiding elements, thereby avoiding abra- sive 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


 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their mountings when distorted into a kidney shape (over 20mm diameter).

 

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

wiper with interference fit on outside diameter, providing a technically accurate closure at the cylinder. special design of wiping lip allows retention of initial lubricating film. back support area prevents tilting of wiper. for housings according ISO 6195 - Type A.

 

 

  • 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 design of the wiping lip, with its extremely rounded outline, aids to maintain the initial lubricating film; any dirt is wiped off reliably.
  • the provision of a support shoulder, along with relief grooves on the matingseal face, prevents tilting of the wiper and pressure build up on the trailing side, which is to be avoided if possible.

 

application

 

 

 

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined only.

 

single acting

 

area of application: pneumatics

  • reciprocating rods on pneumatic cylinders.
  • push rods and valve stems.
  • (materials must be selected according to operating requirements).
  • the profile is suited for mounting space according to ISO 6195-1986 type A.

 

function

WR 04-A pneumatic wipers are designed to keep dust, dirt, sand and metal chips away from the sealing and guiding elements, thereby avoiding 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 < 10 mm 0.2
L ≥ 10 mm 0.3
D1 H11
D H11



cs R [mm]
≤ 5 max. 0,3
>5.......≤ 7,5 max. 0,4
>7,5....≤ 10 max. 0,6
> 10 max. 0,8

 

 

the L1 measurement, which is dependent on the height of the wiper, is selected as follows:

H [mm] L1 [mm]
≤ 7 1
10 1.5
13 2

 

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). when mounted in cylinders that cannot be dismantled, the rings can also be cut open. in such cases, an approx. 2-3% larger diameter should be chosen.

when the wiper is installed, the two ends are snapped into place first, and then the entire ring is pressed in along the entire circumference. no gluing of the joining ends is required.

 

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...

suitable for wiper housing according to ISO 6195/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

wiper to fit in angled housings (30°angle). design mainly used in british equipment, in inch as well as metric dimensions.

 

  • no special holding systems are required for installa the rings snap into grooves and do not require a precision fit.
  • the design of the wiping edge aids recovery of the residual oil film; any dirt is wiped off reliably.
  • this design is used in english machines in particular and is common in both imperial and metric dimensions.
  • special housing designs required (angel on groove face= 30°).
  • 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 only.

 

single acting

 

area of application: hydraulics

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

 

function

WR04 wipers are designed to keep dust, dirt, sand and metal chips away from the sealing and guiding elements, thereby avoiding abra- sive damage caused by external contamination.

 

operating parameters & material

material

temperature

max. surface speed

hydrolysis

dry running

wear resistance

s-mart PU

-30 °C ... +110 °C

4 m/s

-

+

++

s-mart HPU

-20 °C ... +110 °C

4 m/s

++

+

++

s-mart LTPU

-50 °C ... +110 °C

4 m/s

-

+

++

s-mart SPU

-20 °C ... +110 °C

5 m/s

++

++

++

s-mart GPU

-30 °C ... +110 °C

4 m/s

++

+

++

s-mart NBR

-30 °C ... +100 °C

4 m/s

-

-

O

s-mart FKM

-20 °C ... +200 °C

4 m/s

-

-

O

s-mart EPDM2

-50 °C ... +150 °C

4 m/s

++

-

O

s-mart HNBR

-25 °C ... +150 °C

4 m/s

+

O

+

s-mart XPU

-30 °C ... +110 °C

4 m/s

 

 

 

s-mart XHPU

-20 °C ... +110 °C

4 m/s

 

 

 

s-mart XSPU

-20 °C ... +110 °C

5 m/s

 

 

 

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

2 attention: not suitable for mineral oils!

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

+ ... suitable                                                          - ... not suitable

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

 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their mountings when distorted into a kidney shape (over 20mm diameter).

 

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

WR 05 with chamfer, wiper usually fixed in housing with clamp flange. mainly used for replacement in old hydraulic and pneumatic cylinders or for secondary applications.

 

  • in most cases the wipers are retained by the use of clamp rings. they are mainly used as replacement parts in old pneumatic and hydraulic cylinders and, to a lesser extent, as push rod sealing in water hydraulic applications.
  • the design of the wiping edge aids recovery of the residual oil film; any dirt is wiped off reliably.
  • pressure build-up 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: pneumatics

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

 

function

WR 05 pneumatic wipers are designed to keep dust, dirt, sand and metal chips away from the sealing and guiding elements, thereby avoid- ing abrasive damage caused by external contamination.

 

operating parameters

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

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
d according to seal data
D1 H11
D H11

 

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). when mounted in cylinders that cannot be dismantled, the rings can also be cut open. in such cases, an approx. 2-3% larger diameter should be chosen.

when the wiper is installed, the two ends are snapped into place first, and then the entire ring is pressed in along the entire circumference. no gluing of the joining ends is required.

 

 

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...

not suitable for wiper housings according to ISO 6195/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

wiper including additional sealing lip used in combination with O-ring activated PTFE seals (tandem)  to reduce residual oil film. also used as complete solution for pneumat- ic applications in small diameter range. max. allowed pressure load: 16 bar (230 psi).

 

 

 

 

 

  • 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 design of the wiping lip aids recovery of the residual oil film; any dirt is wiped off reliably.
  • no special retainers or narrow housing fits are necessary.
  • in addition, the sealing lip reduces the residual oil film on the side of the medium if composite seals, on PTFE basis, (e.g. S09) are used (tandem arrangement).
  • this design is also used as a complete seal for pneumatic applications with small diameters and leads to a simplification of the sealing structure. 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

 

area of application: hydraulics/pneumatic

  • double wiper rings profil WR11 are designed for axially operated rods in hydraulic and pneumatic cylinders, lifters, and rod guid- ances.
  • reciprocating rods on hydraulic cylinders.
  • push rods and valve stems.
  • (materials must be selected according to operating requirements).
  • use the WR11 design mounting space according to ISO 6195-1986 type C.
  • medium to heavy dirt load.

 

function

WR11 wiper are designed to keep dust, dirt, sand and metal chips away from the sealing and guiding elements, thereby avoid- ing abrasive damage caused by external contamination. slave sealing applications are possible.

 

advantages

double wiper for improvement of total tightness; dimensions also for standardised housing according to ISO 6195 Type C

  • good scraping effect.
  • wear resistant, long service life.
  • retaining residual oil film.
  • standard elements for standardized installation grooves.
  • sealing lips pointing inwards fulfil the function of a U-ring.
  • wiper lip with lightly rounded sealing edge reliably wipes away dirt and leaves a residual oil film on the retracting rod.
  • tightness, service life and friction behaviour of the entire system are improved.

 

the WR11 exerts inwards the wiping function of a U-ring, and a wiping action outwards against soiling

  • intermediate sizes without mould/tool possible.
  • strong wiping action against dirt.
  • very good sealing effect against re-sidual film of oil on the extending rod.
  • wear-resistant.

 

Wiper WR11

 

 

media

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

 

 

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 < 10 mm 0.2
L ≥ 10 mm 0.3
D1 H11
D H11

 

cs R [mm]
≤ 5 max. 0,3
>5.......≤ 7,5 max. 0,4
>7,5....≤ 10 max. 0,6
> 10 max. 0,8

 

lead-in chamfers

length and angle are to be designed to suit the rod seal used.

 

mode of installation

the prerequisites for perfect functioning are careful fitting and an accurately dimensioned mounting space. in general, wipers snap easily into their housing when distorted into a kidney shape (over 20mm diameter).

 

seal & housing recommendations

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

 

fitted:

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

 

description

the WR 12 combination wiper seal without metal reinforcement with special pneu- matic sealing edge.

the WR 12 type has a step profile that will facilitate the installation especially for the small diameters. this wiper has a rounded  wiping lip.

 

 

 

 

application

not bolded symbols; please consult our technical for application limitations

 

category of profile

machined or molded/standard/trade product.

 

double acting

 

area of application: pneumatic

small cylinders.

 

advantages

  • combination seal with minimal space requirements, which seals inwards  and wipes outwards.
  • the special pneumatic sealing edge gives very good tightness with low friction and maintains an effective lubricating film.
  • material with high wear resistance for PU 85 shore A.
  • both functions, sealing and wiping, are performed by a single seal.
  • low assembly costs, easier storage.
  • clean line finish and full function at minimal space requirement.
  • adapted to CETOP dimensions.
  • recess simple and economical to manufacture.
  • no additional axial adjustment required.
  • due to special lip geometry combined with specially developed compounds, the rod seal/wiper profile A11-SC can be used with dry and oil-free air after initial lubrication on assembly.
  • smooth running thanks to optimal balance of sealing lips.
  • no danger of corrosion as the part is made of polymeric material.

 

media:

dry or lubricated air, mineral  oils and greases, non-aggressive gases.

 

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
d f9
D H10

 

cs R [mm]
≤ 5 max. 0,3
>5.......≤ 7,5 max. 0,4
>7,5....≤ 10 max. 0,6
> 10 max. 0,8

fitting & installation

careful fitting is a prerequisite  for the correct function of the seal. the WR 12  for small cylinders can be snapped by hand into the housing grooves provided, with the piston rod removed. it is important to remove all sharp edges from the groove and cylinder to prevent damage to the seals.

 

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

combination wiper seal without metal reinforcement with special pneumatic sealing edge. combines three functions: sealing, wiping, fixing.

 

 

application

 

 

 

 

 

 

category of profile

molded/standard/trade product or machined with minor design change.

 

double acting

 

area of application: pneumatic

  • rod seal e.g. for ISO cylinders.
  • media: lubricated air as well as dry air and oil-free air (after initial lubrication on assembly).

 

advantages

  • combination seal with minimal space requirements, which seals inwards  and wipes outwards.
  • the component needs no additional element (circlip) for axial fixing within the housing.
  • long service life.
  • robust design.

 

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
ØD H11
ØD1 H11

 

  [mm] [mm] [mm]
Ød .....<20 20<....<50 ....>50
R 1.1 1.4 1.8

 

fitting & installation

careful fitting is a prerequisite  for the correct function of the seal. the combination seal A65 is pressed into the housing from outside. the bead on the outside diameter snaps into the circlip groove and fixes the seal in the housing.

 

seal & housing recommendations

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

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

 

description

asymmetric rod seal, extremely wear resistant, for use in lubricated or drypneumatic applications. special design of sealing lip allows retention of initial lubricating film.

 

 

 

 

 

 

  • asymmetric single-acting rod lip seals, with the dynamic sealing lip being shaped differently than the static one.
  • nominal dimension on outside diameter.
  • various materials are available for varying applications.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate of the lubricant.
  • the specific geometry supports the maintenance of the initial lubricating filmthereby avoiding dry-running.
  • for pressures up to 25 bar as a seal between pressurised space and atmosphere.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • suitable for long travel.
  • little tendency of “stick-slip”.
  • small break-away load after prolonged standstill.

 

application

category of profile

machined only.

 

single acting

the RS 05-A seal is designed for use as a rod seal.

 

area of application: pneumatic

  • reciprocating rods on pneumatic cylinders, push rods, fittings.
  • as rod seal in heavy machine construction with impact load.
  • suitable for dry and conditioned air.
  • can be used as a pivot seal for small loads.

 

note

  • the ratio between nominal width and sealing height cs/H should not drop below a value of 1/1.25 (mainly according to ISO 5597 housings for piston and rod seals).

 

function

RS 05-A profiles are lip seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard pneumatic systems (conditioned or dry air with initial lifetime lubrication). 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

PU

-30 °C ... +110 °C

1 m/s

25 bar (2,5 MPa)

-

+

++

 HPU

-20 °C ... +110 °C

1 m/s

25 bar (2,5 MPa)

++

+

++

LTPU

-50 °C ... +110 °C

1 m/s

25 bar (2,5 MPa)

-

+

++

CPU

-30 °C ... +110 °C

1 m/s

25 bar (2,5 MPa)

++

+

++

 SPU

-20 °C ... +110 °C

2 m/s

25 bar (2,5 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.

++ ... 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 wear resistance.

 

gap dimension

referring to the low pressure range in standard pneumatic applications the extrusion gap depends only on cross section and temperature. the maximum value of the permissible extrusion gap is reached when the piston or the piston rod touches one side of the cylindrical tube or the guide. the extrusion gap should not exceed 10% of the cross section for an operating temperature of 70°C.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

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

 

tolerance recommendation

seal housing tolerances
Ød f8
ØD H10

 

mode of installation

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

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

 

insertion chamfer:

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

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

 

seal & housing recommendations

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

 

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

 

Ød [mm]

ØD [mm]

L [mm]

cs = (ØD - Ød)/2 [mm]

5 ~ 24,9

Ød + 8

6,3

4

25 ~ 49,9

Ød + 10

8

5

50 ~ 149,9

Ød + 15

10

7,5

150 ~ 299,9

Ød + 20

14

10

300 ~ 499,9

Ød + 25

17

12,5

500 ~ 699,9

Ød + 30

25

15

700 ~ 1000

Ød + 40

32

20

> 1000

Ød + 40

32

20

 

 

 

 

fitted:

 

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

 

description

asymmetric piston seal, extremely wear resistant, for use in lubricated or dry pneumatic applications. Special design of sealing lip allows retention of initial lubricating film.

 

 

 

 

 

 

  • asymmetric single-acting piston lip seals, with the dynamic sealing lip being shaped differently than the static one.
  • nominal dimension on inside diameter.
  • various materials are available for varying applications.
  • snaps into simple grooves (see notes on installation).
  • best sealing effect across a wide temperature range.
  • sealing effect enhanced by high recovery rate of the lubricant.
  • the specific geometry supports the maintenance of the initial lubricatingfilm thereby avoiding dry- running.
  • for pressures up to 25 bar as a seal between pressurised spaces.
  • good sealing in the low pressure range.
  • excellent static and dynamic sealing.
  • suitable for long travel.
  • little tendency of “stick-slip”.
  • small break-away load after prolonged standstill.

 

application

category of profile

machined product only.

 

single acting

the PS 05-A seal is designed for use as a piston seal - either single or double acting where two seals are used ‘back to back’

 

area of application: pneumatic

  • reciprocating pistons in pneumatic cylinders.
  • as piston seal in heavy machine construction with impact load.
  • suitable for dry and conditioned air.
  • can be used as a pivot seal for small loads.

 

note

the ratio between nominal width and sealing height cs/H should not drop below a value of 1/1.25 (essentially according to ISO 5597 housings for piston and rod seals).

 

function

PS 05-A profiles are lip seals designed to seal pressurised space against the atmosphere or in case of back to back arrangement with inter- mediate guide ring to seal between two pressurised spaces, mainly for reciprocating movements. the design is based on application in standard pneumatic systems (conditioned or dry air with initial lifetime lubrication). 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 hydrolysis dry running wear resistance
s-mart PU -30 °C ... +110  °C 1 m/s 25 bar (2,5 MPa) - + ++
s-mart HPU -20 °C ... +110  °C 1 m/s 25 bar (2,5 MPa) ++ + ++
s-mart LTPU -50 °C ... +110  °C 1 m/s 25 bar (2,5 MPa) - + ++
s-mart GPU -30 °C ... +110  °C 1 m/s 25 bar (2,5 MPa) ++ + ++
s-mart SPU -20 °C ... +110  °C 2 m/s 25 bar (2,5 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.

++ ... 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.

 

gap dimension

referring to the low pressure range in standard pneumatic applications the extrusion gap depends only on cross section and temperature. the maximum value of the permissible extrusion gap is reached when the piston touches one side of the cylindrical tube or the guide.

the extrusion gap should not exceed 10% of the cross section for an operating temperature of 70°C, influences due to thermal expansion and manufacturing tolerances have to be considered.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

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

 

tolerance recommendation

seal housing tolerances
Ød h10
ØD H9

 

mode of installation

for inside diameters of 40mm and more, the seal can generally be slipped over the piston and snapped into closed grooves. due to occuring de- formation force at installation, assembly aid tools are to be used for large cross-sections. the material deformation should not exceed the value of 20%, otherwise the permanent deformation would be too large.

 

recommended mounting space:

plastic guiderings (wearbands) have to feature a adequate cutting gap (recommendation: 2-5% of D). if metalic guides are used, spiral grooves shall be provided. smaller values for Hmin will ease the installation (reduced elongation and mounting force) but the height of the retaining collar has to be sufficient to assure a stable fit in the housing ( larger than cs/2, smaller retaining collars will increase the danger of eversion of the profile).

 

insertion chamfer:

in order to avoid damage to the piston seal during installation, the piston and the housing 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

instead of a chamfer, the piston can also be designed with a radius. recommended size of the radius is equal to size of chamfer (R=c).

 

seal & housing recommendations

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

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

ØD [mm] Ød [mm] L [mm] cs = (ØD - Ød)/2 [mm
5 ~ 24,9 ØD - 8 6 4
25 ~ 49,9 ØD - 10 7 5
50 ~ 74,9 ØD - 12 8 6
75 ~ 149,9 ØD - 16 10 7.5
150 ~ 299,9 ØD - 20 12 10
300 ~ 500 ØD - 24 18 12.5
500 ~ 750 ØD - 30 20 15
> 750 ØD - 40 26 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

he profile PS 05-CS piston seal is a lip seal specially developed for use in pneumat­ics. the dimensions of the profile K05-SC standard series correspond to the cylin­der diameters according to ISO 3320, CETOP RP 52 P, RP 43 P and RP 53 P. profile PS 05-CS is fully interchangeable with the profile standard series formerly used in pneumatics. due to their special structural design, the profile PS 05-CS piston seals offer the following advantages when used in pneumatic equipment.

 

 

 

 

  • sealing lip geometry designed to operate with lubricated air as well as dry and oil-free air.
  • robust design based on favourable dimensions of seal cross-section.
  • tight fit into the groove ensures reliable operation.
  • optimal friction characteristics after careful initial lubrication obtained by sealing lip geometry retaining lubrication film.
  • suitable for cylinders with cushioning.
  • extended service life due to the use of proven elastomers.
  • suitable for cylinders with cushioning.
  • easy snap assembly in grooves of simple design.

 

application

category of profile

machined or molded/standard/trade product.

 

area of application: pneumatic
medium: lubricated air as well as dry air and oil-free air (after initial lubrication on assembly).  

 

single acting
the PS 05-CS seal is designed for use as a piston seal - either single or double acting where two seals are used ‘back to back’

 

operating parameters & material
for high and/or low temperature applications special compounds are available. 
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.

 

fitting & installation
the profile PS 05-CS lip seals are simply pulled over the piston into the groove. to avoid damaging the seal lips during installation, sharp edges should be removed from the piston and the cylinder tube. under non-lubricated conditions it is important to obtain a solid lubrica­tion film inside the cylinder tube. this must be achieved before assembly to ensure a long service life of the seal. for piston guidance we recommend the profile F01 piston guidance tape. please refer to our profile F01 for details of the piston outside diameter and the gap measurements.

 

gap dimension
referring to the low pressure range in standard pneumatic applications the extrusion gap depends only on cross section and temperature. the maximum value of the permissible extrusion gap is reached when the piston touches one side of the cylindrical tube or the guide.   the extrusion gap should not exceed 10% of the cross section for an operating temperature of 70°C,  influences due to thermal expansion and manufacturing tolerances have to be considered.

 

surface quality

surface roughness

Rtmax (μm)

Ra (μm)

sliding surface 0,8 - 2,5 0,28 - 0,60
bottom of groove ≤6,3 ≤1,59
groove face ≤15 ≤4

 

tolerance recommendation

seal housing tolerances
Ød h9
ØD H11

 
 
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 materi­als and/or designs can be recommended.