U-shaped ring under the condition of low pressure, only by the interference of labial ministry seal deformation, due to the contact area is lesser, friction is relatively low. Increase with increasing pressure, lip elastic deformation, stretching, compression and bending stress increases, the u-shaped coil radial pressure automatically, and increasing the length of the sealing contact, until the entire U axial length and sealing surface contact, thereby ensuring high pressure condition with good sealing
pu seals


UHS seals