Common materials and characteristics of Oil seal

   Common materials for oil seals are: nitrile rubber, fluororubber, silicone rubber, acrylic rubber, polyurethane, PTFE, etc.

Nitrile rubber: it has good heat resistance, wear resistance, resistance to various lubricating oils, greases, oil-gas mixtures and other applicable temperatures -30~120 degrees Celsius, but can not be used in phosphate ester hydraulic oil and gear oil containing extreme pressure additives, stable performance in gasoline and low aniline point mineral oil.

Polyacrylate rubber: superior oil resistance, heat resistance, wear resistance, ozone resistance, ultraviolet radiation resistance, especially lubricants containing extreme pressure liquid agents, gear oil, motor oil, engine oil, petroleum hydraulic oil, etc., suitable for working in the range of -30~150 degrees Celsius.

Fluororubber: aging resistance, heat resistance, oil resistance, almost all suitable for lubricating oil, fuel oil, gasoline, not easy to harden in oil containing extreme pressure additives, but cold resistance, high temperature wear resistance is poor, permanent compression deformation is large, suitable for temperature -20~250 degrees Celsius.

Silicone rubber: with outstanding high and low temperature resistance, it can be used for a long time at 150 degrees Celsius without performance change; It can be used continuously for 10000h under 200, and can maintain its unique elasticity and ozone resistance and weather resistance in the working temperature range of -70~260.

PTFE: It has outstanding chemical stability, thermal stability, friction reduction and self-lubrication, and its cracking temperature is above 400. Therefore, it can work normally in the temperature range of -200~300 degrees Celsius. In addition to free fluorine and alkali metals, it has excellent corrosion resistance to chemicals, solvents, hydroxides and acids.