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In the use of pneumatic actuators, the sealing performance directly affects work efficiency, so the selection of O-ring for pneumatic actuators is very important. So what material can be used for the O-ring of pneumatic actuators to make it seal better?
Generally speaking, the selection of O-ring material for pneumatic actuators should be determined according to different working environments and requirements. At present, the materials of O-rings include nitrile rubber, carboxylic nitrile, fluororubber, ethylene propylene rubber, hydrogenated nitrile rubber, silicone rubber, chloroprene rubber, fluorosilicone rubber, polyurethane, chlorohydrin rubber, styrene butadiene rubber, butyl rubber, natural rubber, ethylene/vinyl acetate rubber, polyacrylate rubber, perfluororubber, and so on. These materials each have their own advantages, disadvantages, and applicable ranges, such as:
Nitrile (NBR) has good oil resistance and is suitable for oil media and water; Ethylene propylene diene monomer (EPDM) is resistant to high temperatures and ozone aging, and is suitable for use in hot water and steam; Fluororubber (FPM) has better resistance to high temperatures and chemical corrosion, and is mainly suitable for use in strong acids, bases, and various solvents.
So, in the selection of O-ring material for pneumatic actuators, we need to consider factors such as temperature, pressure, medium, as well as the required sealing performance and service life. Only by choosing the right O-ring material can we ensure the normal operation, safety and reliability of pneumatic actuators.
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