Loaded U-Cups (PolyPak)

Loaded U-cups were primarily designed for dynamic reciprocating applications. The O-rings loader makes this seal excellent for low-pressure rod and piston applications. With loaded U-cups as the system pressure increases, so does the force on the loading lips. Sealing force automatically compensates for the higher pressure, maintaining a positive seal.

A variety of styles, materials and sizes are available to suite your specific requirements.