The buffer ring for BRW rod is a combination ring made of special polyurethane rubber and special nylon resin. The structure is a special U-shaped ring design, which can effectively reduce the pressure of the main seal with the rod at high pressure, and extend the durability of the long rod seal system. Note that it cannot be used alone, but should be used together with the seal ring of the rod. Material selection has high temperature resistance type, high and low temperature resistance universal type to choose from. The notch design on the back of the lip eliminates pressure accumulation between the sealing rings.