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Asymmetrical Unloaded U-Cup


Unlike a standard U-cup where both seal sides have the same dimensions, this asymmetrical unloaded U-cup is constructed with both a static and a dynamic side. The dynamic side features a reduced height seal lip with good film breaking capabilities. The static side features a tall lip to increase the stability of the seal. 

The asymmetrical U-cup is a single direction piston seal, which means it only seals if pressure is coming from one direction. Two loaded U-cups must be installed for dual direction hydraulic piston applications since the sealing method is single directional.

Temperature range: -50°F to +250°F

Applications: Medium duty uses such as mobile hydraulic, agricultural and general industrial

Materials: Urethane or Hytrel®

Max Pressure: 5,000 psi

Max Velocity: 3.2 ft/sec

For more informations about this type of piston seal visit here:

Asymmetrical U-Cup