Retainer and washer

• The retaining ring is used with the sealing ring to prevent the sealing ring from being squeezed into the gap on the low pressure side due to the large eccentricity of the movement or under the continuous increase of pressure, so that the sealing ring will inevitably lose and eventually destroy the seal. If the use of a stop ring can prevent the seal ring is squeezed into the radial clearance of the low pressure side, while maintaining the original sealing effect, and can prevent the seal from wearing too fast, therefore, the stop ring is a supplement to the seal ring, which is not a seal itself, but improves the working pressure range of the seal ring.