Hydraulic Seals
description
wiper with interference fit on outside diameter, providing a technically accurate clo- sure at the cylinder. wiping edge assures a reliable protection against penetration of dust and dirt whilst allowing backflow of residual oil 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 aids the recovery of residual oil film while exclusion of foreign matter is maintained.
- pressure build-up on the trailing side is to be avoid if possible.
application
not bolded symbols; please consult our technical for application limitations
single acting
area of application: hydraulics
- reciprocating rods on hydraulic 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 WR 01 should be used.
function:
WR 01 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.
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 |
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 recommend.
description
wiper with interference fit on outside diameter, providing a technically accurate clo- sure at the cylinder. wiping edge assures a reliable protection against penetration of dust and dirt whilst allowing backflow of residual oil 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 aids the recovery of residual oil film while exclusion of foreign matter is maintained.
- the provision of a support shoulder, along with relief grooves on the mating seal face, prevents tilting of the wiper and pressure build up on the trailing side.
application
category of profile
machined or molded/standard/trade product.
single acting
area of application: hydraulics
- reciprocating rods on hydraulic 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 C.
function:
WR 01-A wipers are designed to keep dust, dirt, sand and metal chips 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 |
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...
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.
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 recommend.
description
wiper with interference fit on outside diameter. wiping edge assures a reliable protec- tion against penetration of dust and dirt whilst allowing backflow of residual oil film.
- 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 the recovery of residual oil film while exclusion of foreign matter is maintained.
- 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
- reciprocating rods on hydraulic cylinders.
- push rods and valve stems.
- (materials must be selected according to operating requirements).
- the WR 02 design is to be used for mounting spaces according to ISO 6195-1986.
function:
WR 02 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 |
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).
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. wiping edge assures a reliable protec- tion against penetration of dust and dirt whilst allowing backflow of residual oil film. back support area prevents tilting of wiper.
- 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 the recovery of residual oil film while exclusion of foreign matter is maintained.
- the provision of a support shoulder, along with relief grooves on the mating seal face, prevents tilting of the wiper and pressure build up on the trailing side.
- support shoulder not included in design WR 02-A
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
- reciprocating rods on hydraulic cylinders.
- push rods and valve stems.
- (materials must be selected according to operating requirements).
- the WR 02-A design is to be used for mounting spaces according to ISO 6195-1986 type C.
function:
WR 02-A 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.
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 |
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 20 mm 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
as profile WR 02, but without back support area special housing design according ISO
6195-Type C.
- 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 the recovery of residual oil film while exclusion of foreign matter is maintained.
- the provision of a support shoulder, along with relief grooves on the mating seal face, prevents tilting of the wiper and pressure build up on the trailing side.
- support shoulder not included in design WR 02-B .
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
- reciprocating rods on hydraulic cylinders.
- push rods and valve stems.
- (materials must be selected according to operating requirements).
- the WR 02-B design is to be used for mounting spaces according to ISO 6195-1986 type C.
function:
WR 02-B 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.
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.
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
- reciprocating rods on hydraulic cylinders.
- push rods and valve stems.
- (materials must be selected according to operating requirements).
- the WR 02-B design is to be used for mounting spaces according to ISO 6195-1986 type C.
function:
WR 02-B 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.
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 |
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).
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
WR02-C is manufactured in polyurethane. the static sealing lip ensures against the intrusion of dirt and fluids over the outer diameter. WR02-C has no interference at the outside diameter and can have a radial movement due rod deviations.
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 advantages
- high wear resistance.
- good prevention against external fluid intrusion.
- compensation of radial rod excursion.
- easy installation.
- space-saving construction.
application examples
these scrapers are recommended wherever there are dusty and humid conditions and especially for the following applications:
- mobile hydraulic machinery.
- agriculture machinery.
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 | h9 |
| D | H9 |
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
WR 02-D is manufactured in polyurethane. the static sealing lip ensures against the intrusion of dirt and fluids over the outer diameter.
WR 02-D has an interference to the groove outside diameter.
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 advantages
- high wear resistance.
- good prevention against external fluid intrusion.
- easy installation.
- space-saving construction.
application examples
these scrapers are recommended wherever there are dusty and humid conditions and especially for the following applications:
- mobile hydraulic machinery
- agriculture machinery
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 | h9 |
| D | H11 |
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 paes 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
wiper with mounting cage for press-fit installation into axially open housings. wiping edge assures a reliable protection against penetration of dust and dirt, the use of plastic mounting cages avoids corrosion in the press-fit. for housings according ISO 6195-Type B.
- 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 trailing side.
- the use of plastic for the retaining ring prevents corrosion in the seat.
- an interference fit on the outside diameter ensures the wipers are held in place
and also prevent humidity and foreign matter from entering via the outside
diameter.
- this profile is not suited for pressure from the trailing side.
application
not bolded symbols; please consult our technical for application limitations
category of profile
machined only.
single acting
area of application: hydraulics & pneumatics
- reciprocating rods on hydraulic 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 B.
function
WR 03 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.
notes on special materials:
at temperatures above 80°C, the internal stress of POM may be lost. for the use of retaining rings above 80°C or below -30°C, the PEEK material may be
used (for limits to application see data sheet). aluminium rings have also been successfully used (shaping according to standard range). please note that the application limits are determined by all the materials used.
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 | h8 |
mode of installation
the prerequisites for perfect functioning are careful fitting and an accurately dimensioned housing space. the wiper is pressed in; installation can also be done separately (first the retaining ring is snapped in and then the elastomer part).
installation
| H [mm] | chamfer [mm] with angle 20⁰ |
| ≤ 4,5 | 0,6 |
| 5 | 0.6 |
| 6 | 0.8 |
| 7 | 0.8 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1.4 |
| 12 | 1.8 |
| 14 | 2 |
| 16 | 2.4 |
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...
suitable for wiper housings according to ISO 6195/B.
fitted:
description
elastomer wiper with a sharply-defined lip edge and metal housing. the two parts are vulcanized in a single unit.
application
not bolded symbols; please consult our technical for application limitations
category of profile
molded/standard/trade product or machined with minor design change.
single acting
area of application: hydraulics & pneumatics
hydraulic and pneumatic systems, reciprocal movements, medium dirt load.
function
the WR 03-A is a single function wiper. It is pressed against the descending piston rod wiping the dirt from the surface of the rod. the seals, their associated elements and the hydraulic medium are protected from dirt. the metal angle ring with its additional press fit on the outer circumference, ensure the functionally correct fit of the wiper in the housing.
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.
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 | h8 |
fitting & installation
the wiper is easily built in to split housing, provided the lead-in chamfer is in accordance with the table below:
| H [mm] | chamfer [mm] with angle 20⁰ |
| ≤ 4,5 | 0,6 |
| 5 | 0.6 |
| 6 | 0.8 |
| 7 | 0.8 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1.4 |
| 12 | 1.8 |
| 14 | 2 |
| 16 | 2.4 |
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...
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
elastomer wiper with a sharply-defined lip edge and metal housing. the two parts are vulcanized in a single unit.
application
not bolded symbols; please consult our technical for application limitations
category of profile
molded/standard/trade product or machined with minor design change.
single acting
area of application: hydraulics & pneumatics
hydraulic and pneumatic systems, reciprocal movements, medium dirt load.
function
the WR 03-A is a single function wiper. It is pressed against the descending piston rod wiping the dirt from the surface of the rod. the seals, their associated elements and the hydraulic medium are protected from dirt. the metal angle ring with its additional press fit on the outer circumference, ensure the functionally correct fit of the wiper in the housing.
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.
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 |
fitting & installation
the wiper is easily built in to split housing, provided the lead-in chamfer is in accordance with the table 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...
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
scraper ring, mainly used in combination with wiper WR 07. firmly clinging dirt and extremely heavy soiling (mud, tar, ice) is wiped off, following elastomeric wiper is protected from damage. recommended materials provide good dry running proper- ties, high stiffness and breaking strenght.
- this design has been developed as a scraper ring and is used in combination with
WR 07 wipers.
- housing fit required is H9.
- the recommended materials offer good dry running properties, as well as high stiffness, stability and breaking strength.
application
not bolded symbols; please consult our technical for application limitations
category of profile
machined only.
single acting
area of application: hydraulics & pneumatics
reciprocating on working cylinders with hard and encrusted dirt in combination with WR 07.
function:
WR 07 wipers are designed to scrape off hard and encrusted dirt in front of the wiper, thereby protecting the elastomer wiper from dam- age.
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 |
| ØD1 | ±0,1 |
| ØD | h9 |
mode of installation
the wiper can be snapped in. prerequisite is the correct design of the groove geometry. the diameter of the retaining step should be approx.
1 mm smaller than the outside diameter. a corresponding chamfer is required for fitting. usually, a thickness of 2 to 2.5mm should be sufficient. for a more sturdy design, retaining rings may be 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...
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 mounting cage for press-fit installation into axially open housings. wiping edge assures a reliable protection against penetration of dust and dirt, the use of plastic mounting cages avoids corrosion in the press-fit. for housings according ISO 6195-Type B.
- 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 trailing side.
- the use of plastic for the retaining ring prevents corrosion in the seat.
- an interference fit on the outside diameter ensures the wipers are held in place
and also prevent humidity and foreign matter from entering via the outside
diameter.
- this profile is not suited for pressure from the trailing side.
application
not bolded symbols; please consult our technical for application limitations
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
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
two-piece double wiper consisting of dynamic wiper ring and a static 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 trailing side.
- the use of plastic for the retaining ring prevents corrosion in the seat.
- an interference fit on the outside diameter ensures the wipers are held in place
and also prevent humidity and foreign matter from entering via the outside
diameter.
- this profile is not suited for pressure from the trailing side.
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.
- 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 trailing side.
- the use of plastic for the retaining ring prevents corrosion in the seat.
- an interference fit on the outside diameter ensures the wipers are held in place
and also prevent humidity and foreign matter from entering via the outside
diameter.
- this profile is not suited for pressure from the trailing side.
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
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...
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
wiper with secondary lip, the technically accurate closure at the cylinder is providing reliable protection, even for heavy contamination.
- 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 wiper seals by means of a secondary lip on the housing face. the tension of the secondary lip exerts pressure on the lip / shaft contact point, ensuring reli- able sealing both in static and dynamic areas.
- 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 only.
single acting
area of application: hydraulics
- reciprocating rods on hydraulic cylinders.
- push rods, valve stems, equipment for underground working, equipment with major eccentricity, systems with highly abrasive con- tamination.
- fully mounted cylinders that are dip-coated do not impair the function of the wiper.
- materials must be selected according to operating requirements.
function:
WR 51 wipers are designed to keep dust, dirt, sand and metal chips 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 rub- ber 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 | ±0,1 |
| 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).
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.