We have over 27 years of experience.



U-seals or U-cups, are used in rod or piston applications (symmetrical U-seals can be used in either application). The Unloaded U-seals have nothing between the two lips.

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. This assembly is used to block or separate fluid in reciprocating motion applications. Hydraulic seals use is critical in providing a way for fluid power to be converted to linear motion.

Unloaded U-seals come in the following common styles:

  • DRU-style Unloaded U-seals
  • BS (DRTU-style) Unloaded U-seals
  • DPU-style Unloaded U-seals
  • DSU-style Unloaded U-seals
  • HU-style Unloaded U-seals
  • 8400-style Unloaded Symmetrical U-seals (Pneumatics)

U-seals are available in standard and metric sizes. Out extensive inventory of U-seals is available in a range of standard and metric sizes. We offer same-day shipping and perform quality checks of every order, so you know that your critical parts will meet your application specifications.


Our products is equipped with worldwide first class testing and manufacture equipment, adopt the rubber formulation and raw material from Japan and Europe, try for realizing the design and development synchronous.

Our Certification: We have passed the ISO9001, certificate successively, design the ERP system by ourselves, and practiced Network Administration for Quality system, Management, Human Resource, Raw material, Design, Manufacture, Sales and Finance incorporate.