The material selection of the sealing ring is directly related to its performance and life. Common sealing ring materials include rubber, silicone, polytetrafluoroethylene, etc., these materials have their own characteristics. Rubber sealing ring has good elasticity and wear resistance, suitable for general sealing occasions; Silicone sealing ring is resistant to high temperature and corrosion, suitable for sealing in special environment; The PTFE sealing ring has excellent chemical stability and low friction coefficient, which is suitable for high-precision sealing. When selecting the sealing ring material, it is necessary to comprehensively consider the working environment, medium characteristics, temperature range and other factors to ensure the performance and life of the sealing ring.