U cup seals

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U Cup Seals:

 U-Cup Seals or U-Ring Seals are commonly used in linear applications to seal the rod or piston. 
Loaded U-Cups, Non loaded U-Cups, Hydraulic or Pneumatic U-Cups.

 The function of a cup seal, or U cup piston seal is to contain pressure on one side of a piston without leakage, and allowing maximum effort to be applied to moving the piston along the bore of a cylinder. It is also referred as lip seals, u ring seals are one of the oldest seal designs. 

 U cup have flared outer lips that work to create an exceptional seal for low pressure and low speed applications with consistently steady movement. U ring seals are often used for sealing rods and are simple to work. 
The general material using for U cup seals are polyurethane.

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