Homogenous U-cups (HU) are non-loaded U-cups. They are a popular seal in low pressure applications where a low friction seal is beneficial. HU seals are most commonly used in pneumatic applications as a rod or piston seal. The design is suited for situations where space is limited. HU seals are typically made from 70A or 80A durometer nitrile materials. These seals can withstand pressures of up to 250 PSI in pneumatic applications, and up to 1,250 PSI in hydraulic applications.

See homogeneous U-cup literature for more information.