Rubber U-Ring Seal

Description:

U-Ring seals (also called U-seals, U-cup, and Symmetrical seals) are a multi-purpose seals and are called U-Ring seals because of their U-shaped cross-section. U-Ring is a commonly used seal in hydraulic cylinders. It is a typical lip seal. It can obtain good sealing effect no matter it is used for piston or piston rod. Under low pressure, U-Ring can only rely on The interference deformation of the lip produces a seal, because the contact area is small and the friction force is relatively low. As the pressure increases, the elastic deformation of the lip increases, the tensile, compressive, and bending stresses increase, and the U-Ring radially compresses The force increases automatically, and the length of contact with the sealing surface continues to increase until the entire axial length of the U-Ring contacts the sealing surface, thereby ensuring good sealing performance under high pressure.

Classification:
1) U-Ring for the shaft.
2) U-Ring for the hole.
3) Double-use U-Ring for hole and shaft.