Hydraulics · Technical sheet

Hydraulic piston seals

Seals separating cylinder chambers at the piston diameter. Match the design to pressure direction, groove geometry and any support rings.

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DHd

Family illustration; not an individual profile or manufacturing drawing.

41reference profiles
Geometryaccording to selected profile
Compoundto match service conditions

Reference profiles.

Open a profile for construction details and the available manufacturer technical sheet.

FORSEAL FOAAsymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • V-spring as preload element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

HDP330Sliding ring with step cut

Construction features

  • Sliding ring with step cut
  • Symmetrical
  • Double-acting

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

L27Symmetrical

Construction features

  • Symmetrical
  • Four-piece
  • Support rings

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

L43Symmetrical

Construction features

  • Symmetrical
  • Five-piece
  • Support rings

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NA150Asymmetrical

Construction features

  • Asymmetrical
  • Sharp, cut sealing edge
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NA250Asymmetrical

Construction features

  • Asymmetrical
  • Sharp, cut sealing edge
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NA300Asymmetrical

Construction features

  • Asymmetrical
  • Sharp, cut sealing edge
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NA400Asymmetrical

Construction features

  • Asymmetrical
  • Sharp, cut sealing edge
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NRRAAsymmetrical

Construction features

  • Asymmetrical
  • Round spring as preload element
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NRS -0215Asymmetrical

Construction features

  • Asymmetrical
  • Two-piece
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NRS -0217Asymmetrical

Construction features

  • Asymmetrical
  • Two-piece
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

NRVAAsymmetrical

Construction features

  • Asymmetrical
  • V-spring as preload element
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

OMEGAT OMK-EAsymmetrical

Construction features

  • Asymmetrical
  • Two-piece
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

OMEGAT OMK-ESAsymmetrical

Construction features

  • Asymmetrical
  • Two-piece
  • Profile ring provides sealing and preload

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

OMEGAT OMK-MRSymmetrical

Construction features

  • Symmetrical
  • Two-piece
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

OMK-PUSymmetrical

Construction features

  • Symmetrical
  • Two-piece
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

OMEGAT OMK-QRSymmetrical

Construction features

  • Symmetrical
  • Two-piece
  • Quad ring as preload element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

OMEGAT OMK-SSymmetrical

Construction features

  • Symmetrical
  • Two-piece
  • Profile ring provides sealing and preload

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

PIAsymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

SIMKO 300Symmetrical

Construction features

  • Symmetrical
  • Rectangular energising and sealing ring

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

SIMKO 320Symmetrical

Construction features

  • Symmetrical
  • Angle bushings
  • Fabric reinforcement across the running and sealing edge

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

SIMKO SK520Symmetrical

Construction features

  • Symmetrical
  • Support rings
  • Fabric reinforcement across the running and sealing edge

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

T18Asymmetrical

Construction features

  • Asymmetrical
  • Sharp, cut sealing edge
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

T19Symmetrical

Construction features

  • Symmetrical
  • Angle bushings

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

T42Symmetrical

Construction features

  • Symmetrical
  • Four-piece
  • Support rings

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

T44Symmetrical

Construction features

  • Symmetrical
  • Four-piece
  • Support rings

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

TDUOHBase body made of steel

Construction features

  • Base body made of steel
  • Symmetrical
  • Round spring as preload element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

TFMASymmetrical

Construction features

  • Symmetrical
  • Double-acting
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

TM21Asymmetrical

Construction features

  • Asymmetrical
  • Shortened outer lip

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

T MFAsymmetrical

Construction features

  • Asymmetrical
  • Round spring as preload element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

T OFAsymmetrical

Construction features

  • Asymmetrical
  • Without tension spring

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

K70Asymmetrical

Construction features

  • Asymmetrical
  • Double-acting
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

K84Symmetrical

Construction features

  • Symmetrical
  • Double-acting
  • Profile ring provides sealing and preload

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KK03Symmetrical

Construction features

  • Symmetrical
  • Double-acting
  • Five-piece

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KK22Symmetrical

Construction features

  • Symmetrical
  • Double-acting
  • Angle bushings

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KNA16Asymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • Main lip outside

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KNA23Asymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • Main lip outside

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KNA28Asymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • Main lip outside

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KNA44Asymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • V-spring as preload element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KPOR30Symmetrical

Construction features

  • Symmetrical
  • Double-acting
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

KPOR31Asymmetrical

Construction features

  • Asymmetrical
  • Single acting
  • O-ring as sealing and preloading element

Technical documentation

Manufacturer technical sheet: section geometry, dimensions and operating information for the referenced profile.

Technical sheet · PDF · EN ↗

FST catalogue reference. Dimensions and compound must match the selected item.

Data for the correct selection.

Selection parameterWhat to specify
DimensionsShaft/rod or bore diameter d/D; groove diameter; width H; tolerances
Material and compoundCompound code, hardness, reinforcements and any required approvals. Check the individual profile document.
MediumFluid type, concentration, additives and cleaning agents.
Service conditionsMinimum/maximum temperature, pressure and peaks; sliding speed or rotation; duty cycle.
InstallationGroove drawing, surface finish, clearances, pressure direction and assembly method.
Traceability and documentsSpecify the required compound, conformity declarations and batch documentation in the enquiry.

Temperature, pressure and speed limits depend on the exact compound, profile and installation. Do not combine maximum ratings from different conditions or extend one profile’s ratings to the whole family.

RFQ · Seals

Define your technical enquiry.

Select the reference and enter your operating conditions. You can add your details and drawing on the next page.

This step prepares the technical summary. The request is sent only after completing and submitting the contact form.

Profile identifiers refer to the FST technical catalogue. Supply configuration and documentation are confirmed for the specific enquiry.

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