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U cup seals

Update:2016-03-19

U cup seals derive their name from their shape and are self-sealing on both the inside diameter and outside diameter.  They are most often used for sealing rams or rods and are very popular due to the small gland space required.  They are especially adapted to low speed, low pressure environments for both pneumatic and hydraulic cylinders. They provide an extremely smooth, steady movement because of their inherent low friction.

 
The seal is obtained by Means of the flared, flexible lips coming in contact with the rod or cylinder wall.  Clearance is provided at the heel for minimum friction.  Through this design, the packing is pre-loaded when installed.  Sealing effectiveness increased by internal pressure of the air or fluid (Hydraulic Seal) against the inner surface of the lips.  For continued sealing effectiveness and long seal life, the surface finish of the working surface of either rods or bores should be a maximum of 16 Micro-Inches.  It is not recommended that U cup seals or any other single lip seal be used in any application where there is excessive side loading.

DSH Seals will supply you a satisfy sealing solution, feel free to contact us.