Common materials for oil seals are NBR/Buna-N/nitrile, FKM/Viton, silicone, polyurethane, PTFE/Teflon, ACM, etc. NBR and Viton rubber materials are widely used on oil seals.
Nitrile rubber (NBR) – It has a good heat resistance and wear resistance, and is resistant to various lubricating oils, greases, oil and gas mixtures, etc., and is suitable for temperatures ranging from -30 to 120 degrees Celsius, but it cannot be used in phosphate ester hydraulic oils and gear oils containing extreme pressure additives. It is stable in gasoline and low aniline point mineral oil.
FKM/Vion – Aging resistance, heat resistance, oil resistance, suitable for almost all lubricating oil, fuel oil, gasoline, not easy to harden in oil containing extreme pressure additives, but poor cold resistance, high temperature wear resistance, large permanent compression deformation, suitable for At temperature -20~250 degrees Celsius.
Silicone ‘- It has outstanding high and low-temperature resistance, and can be used for a long time at 150 degrees Celsius without performance changes; it can be used continuously for 10,000 hours at 200 degrees Celsius and can maintain its unique use elasticity and ozone resistance and resistance in the working temperature range of -70~260 degrees Celsius. weather and other advantages.
PTFE/Teflon – 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, hydroxide compounds, and acids.
Polyacrylate Rubber (ACM) – Excellent oil resistance, heat resistance, wear resistance, ozone resistance, UV radiation resistance, especially resistance to extreme pressure fluids containing lubricating oil, gear oil, motor oil, motor oil, petroleum hydraulic oil, etc., suitable for -30~150 degrees Celsius scope work.