The selection of sealing ring material is of great significance to its sealing performance and service life. The performance of the material directly affects the service performance of the sealing ring. The most common sealing rings are V-shaped sealing ring (also known as elastic rubber sealing ring), U-shaped sealing ring (hydraulic sealing ring), O-shaped sealing ring (hydraulic cylinder sealing ring), rectangular sealing ring, Y-shaped sealing ring, yx-shaped sealing ring for hole, yx-shaped retaining ring for hole, yx-shaped sealing ring for shaft, yx-shaped retaining ring for shaft, O-shaped rubber sealing ring, retaining ring for O-shaped sealing ring, J-shaped frameless dust ring, etc