Piston Rod UN Cup Seal

The piston rod UN Cup seal is the most commonly used oil seal in hydraulic cylinders. It is a typical lip seal that provides good sealing performance for both piston and piston rods. In the case of low pressure, the U-ring only seals by the interference deformation of the lip. As the pressure increases, the elastic deformation of the lip increases, the tensile, compressive and bending stresses increase, and the radial pressure of the U-ring automatically increases. The length of contact with the sealing surface is continuously increased until the entire axial length of the U-ring is in contact with the sealing surface, thereby ensuring good sealing under high pressure. UN is universal for the hole axis. Its shape is symmetrical on both sides of the lip. It can withstand a working pressure of 21MPa~35MPa and can withstand temperatures from -35 to 100°C.
  • Hydraulic Press UN Piston Rod Seal for Excavator

    Hydraulic machine UN piston rod seal is used for the excavator to be installed on the piston. The main function is to seal the gap between the piston and the cylinder to prevent leakage of hydraulic oil. The piston seal is the main seal in the hydraulic cylinder. It is one of...
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