Yxd-PU U-Cup Hydraulic Piston Y Seal

introduction

U cup seal has a U-shaped cross-section and Y seal
has a Y-shaped cross-section, and they are typical lip seals. Although U cup seal is a little bit different from Y seal in shape, they are often thought of the same sort of seal concerning their working principles. U cup seal, additionally named U cup piston seal, stems in various shapes and materials. Shapes comprise single lip U-cups, twin lip U-cups, rod seals with or without anti-extrusion rings, and materials chiefly include rubber, highly saturated nitrile, nitrile (Buna-N), PTFE, Fluorocarbon (FKM) or Urethane. Y-type/U cup piston seal can be divided into lips with different heights. Y seals are used for holes or shafts according to whether the heights of two lips are the same or not.

U cup seals refer to several kinds of seal, namely, rod U-cups, piston U cups, symmetrical U-cups, and A.N. type U cups. U cup seal/Y seal or its various modified shapes, such as piston U seal or piston rod, is exclusively developed for pneumatic use and distinct from the similar seals used in hydraulics. There are many different U-cup seal configurations can be found in DSH Seals to seal that demanding application properly.

The U cup piston seal is broadly applied in the reciprocating dynamic sealing devices, which usually means the U cup seal or Y seal is mainly used for reciprocating sealing. Out of that working principle, we can know that the lip side of the Y seal or U cup seal must be installed to face the high-pressure side, and the Y seal ring can only work in one direction.

Features

The Y seals/U-cup piston seals in DSH Seals are well accepted by cylinder
manufacturers and equipment builders. The U-cup seal is a specialized piston seal design, developed from the
standard symmetrical U-cup. It assures improved sealing performance due to the following features:

1. Improved lip design. Both lips have precision knife trimmed chamfers to provide
complete circumferential lip contact.

2. Larger than the groove for which it is intended, which ensures a tight fit in the
slot to prevent movement of the seal during cylinder operation.

3. Reliable sealing performance. There are enough contact area and pre-load to
guarantee its sealing effect.

4. Small frictional resistance. This feature enables the seal to provide smooth
movement.

5. Shrinkage and low-temperature leakage resistant.

6. Good pressure resistance. It can work under a wide application pressure range
without failure, with working pressure up to 40MPa.

7. Good distortion resistance.

8. High reciprocating speed. Its running speed reaches average 0.5m/s, which makes
it especially suitable for the hydraulic cylinder in heavy machinery.

9. Simple structure and easy to install.

◆◆ PTFE,NBR,FKM,PU

◆◆ U-Cup For Piston – YxD