NBR Material X-RING 91.44*5.33MM

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NBR material X-RING 91.44*5.33MM

The star ring is the most commonly used seal in hydraulic cylinders. It is a typical lip seal. It can be used for both piston and piston rods. U-rings are only used in low pressure situations. The interference deformation of the lip produces a seal. Due to the small contact area, the frictional 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 radial pressing force increases. It automatically enlarges and the length of contact with the sealing surface increases until the entire axial length of the U-ring contacts the sealing surface, thus ensuring good sealing under high pressure.