Unloaded U-Seals

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Unloaded USeals

U-seals or U-cups Applications

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.

Hydraulic seals can be made from a variety of materials such as

  • polyurethane
  • rubber
  • PTFE (a generic compound of Teflon™, a trademark of The Chemours Company).

The type of material is determined by the specific operating conditions or limits due to fluid type, pressure, fluid chemical compatibility or temperature.

A static seal is located in a groove and sees no movement, only sealing within its confined space

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.

At Rocket Seals, our commitment to the highest standard of customer service includes technical support to assist you in selecting the U-seal that will meet the needs of your application.

Contact Rocket Seals today to see how we can solve your sealing challenges.

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