Static Seal NBR FKM PU coated X-ring available from stock to support customization

Star ring is the most commonly used seal in hydraulic cylinder, it is a typical lip seal, whether used for piston or piston rod can obtain a good sealing effect, U-ring in the case of low pressure, only by the interference deformation of the lip to produce sealing, because of the small contact area, the friction force is relatively low, as the pressure rises, the elastic deformation of the lip increases, tensile, compression and bending stress increases, the radial compression force of the U-ring automatically becomes larger, and the length of contact with the sealing surface continues to increase, until the entire axial length of the U-ring is in contact with the sealing surface, This ensures good sealing under high pressure.