PMQ or MVQ silicone rubber heat, cold is good, compression is small, but the mechanical strength is low, only for static sealing. -60 To +230 for high, low temperature food machinery, electronic products on the seal.

　　ACM heat better than polypropylene ester rubber NBR, containing polar additive in a variety of lubricating oil, hydraulic oil, hydraulic oil in the oil system work, water-poor. -20 To +150 for a variety of automotive oil seals and a variety of gear box, gearbox, can withstand high temperature.

　　EPDM or ethylene-propylene rubber EPM and good weather, the air aging resistance, weak acid, and a variety resistant to Freon refrigerants, does not apply to mineral oil. -55 To +260 widely used in refrigerators and refrigeration mechanical seal. Resistance to steam to 200 ℃, high temperature gas to 150 ℃.

　　Teflon PTFE chemical stability, heat, cold is good, oil, water, gas, chemicals and other media. High mechanical strength, high pressure, wear resistance, low coefficient of friction, self-lubricating. PTFE has the phenomenon of creep and cold flow in a certain time under sustained load the deformation of growth continue to increase (this phenomenon has a great relationship with temperature). Generally can not be used as hydraulic pure PTFE sealing material, only to use of PTFE-filled, often there are bronze powder filled and glass-filled, these fillers reduce the coefficient of thermal expansion, thermal conductivity to improve the ability to increase the wear resistance, improved resistance to cold flow (creep) performance. PTFE is not flexible, so it is always used in conjunction with the elastomer by them with the required preload to complete a perfect seal. -55 To +260 for the manufacture of seal rings, wear rings, guide ring (band), ring, etc., commonly used for the mechanical seal material. Widely used in metallurgy, petrochemical, engineering machinery, light machinery, almost all industries.