USH‑Type piston & rod combined seal is a versatile dual‑purpose hydraulic seal, applicable for both piston and piston rod positions in reciprocating hydraulic cylinders. It features a classic U‑lip profile, which generates reliable contact pressure against the mating surface under hydraulic pressure to block fluid leakage.
Manufactured from high‑quality polyurethane, the USH seal delivers outstanding wear resistance, low friction and anti‑extrusion performance. The flexible U-shaped lip can adapt to slight eccentricity of moving parts and maintain consistent sealing effect during continuous back‑and‑forth motion. Its standardized cross-section fits common seal grooves, requiring no extra machining and enabling fast installation and replacement.
Thanks to its dual-use design, one seal type covers piston and rod sealing scenarios. This helps hydraulic equipment users simplify spare part inventory and reduce procurement costs. It works stably under medium pressure conditions and is widely used in injection molding machines, light construction machinery and general industrial hydraulic systems.
When assembled with wiper seals and guide rings, the USH‑type combined seal forms a complete hydraulic sealing assembly. It effectively minimizes hydraulic oil leakage, reduces equipment downtime and offers a cost‑effective reciprocating sealing solution for various hydraulic cylinder applications.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
