U Cup Seal Design

Loaded u seals or u cups sometimes called polypaks are loaded with an o ring or sometimes a quad ring between the two lips to increase the sealing force at low pressures.

U cup seal design.

Larger than the groove for which it is intended. The spring loads the seal s lips against the mating hardware creating a seal capable of compensating for movement in dynamic applications. Mfp offers a wide range of u cup designs and produces them from a broad range of materials. The o ring store offers an assortment includes rod piston and wiper seals as well as guides o rings and back up rings.

U cup has an od. Rated for pressure up to 10 000 psi these leather u cups handle over 80 times more pressure than our buna n u cups. The following are part number examples of the various o ring loaded u cup design types which have the same inside and width values but differing depths. U cup is a specialized rod seal design developed from the standard symmetrical u cup.

The unloaded urethane u cup design provides an excellent heavy duty seal for both piston or rod applications and works well in static and dynamic applications. Hydraulic sealing solutions for fluid power applications have become a priority in our continued product offering. U cup seal design these type of parts are relatively soft non metallic rings placed in a groove or fixed in a combination of rings forming a seal assembly. U cups seals symmetrical design.

Many different u cup configurations exist to properly seal that demanding application. Rated for pressure up to 10 000 psi these leather u cups handle over 80 times more pressure than our buna n u cups. Spring energized u cups spring energized u cups are engineered plastic seals that incorporate a metallic spring. O ring loaded u cup seals also known as loaded lip seals and polypaks an o ring secures these u cups to the rod or piston for better sealing performance at lower pressures than unsupported u cup seals.

This insures a tight fit in the groove to prevent movement of the seal during. O ring loaded u cup seals also known as loaded lip seals and polypaks an o ring secures these u cups to the rod or piston for better sealing performance at lower pressures than unsupported u cup seals. The design configurations are identified as follows. The thin flexible lip design reacts to low pressure and provides an extremely smooth steady movement with less break away force required because of the inherent low friction.

It assures improved sealing performance due to the following features. Parker s 8400 profile u cup is a light load symmetrical lip seal for use in either rod or piston sealing applications. The fourth part of the numbering system identifies the specific seal design configuration required. The unloaded urethane u cup is commonly known as a disogrin u cup.

Homogenous u cups homogenous u cups are popular in low pressure applications where a low friction seal would be beneficial.