V&G Valogin

Material selection of non-metal sealing gasket materials

Gasket Materials: A mechanical device known as a gasket in sealing connects flanges and stops leaks. Boilers, tanks, and piping are just a few examples of the devices and applications it is used in across many different industries. There is no question that these industrial gaskets must endure extreme pressure and are exposed to fuels, chemicals, and other dangerous materials. Therefore, the material used to make these gaskets must be strong, rust-free, and resistant to various chemicals and abrasions. Most metals can corrode over time or react with specific substances, which can cause them to wear out. Consequently, non-metallic gaskets are often employed in a variety of applications. The several kinds of materials that may be utilized to create non-metallic gaskets are covered in this article.

  1. NBR(Nitrile -butadiene rubber)

NBR is a kind of synthetic rubber, suitable for application of a wide temperature range with good resistance to oil, basic hydrocarbons, petroleum and natural gas. It has good corrosion resistance to hydroxide, salt and neutral acid. However, in strong oxidizing media, chlorinated hydrocarbons, ketones and lipids, its corrosion resistance is poor, the recommended operating temperature is 51℃~121℃.

  1. FluoroRubber(FKM)

Has good corrosion resistance to oil, fuel, chloride solution, aromatic hydrocarbon and lipid hydrocarbon and strong acid, but not suitable for amine, lipid, ketone and steam. The recommended operating temperature is -40℃~232℃.

  1. Silicone rubber(SIL)

Good corrosion resistance to hot air. Silicone rubber is impervious to sunlight and ozone.However, it is not suitable for use in steam, ketones, aromatic hydrocarbons and lipid hydrocarbons.

  1. Ethylene-Propylene-Diene Monomer(EPDM)

EPDM is a copolymer of ethylene, propylene and a small amount of non-conjugated diolefin. With the properties of low density and high filling, aging resistance, corrosion resistance, water vapor resistance and overheated water resistance. The lowest operating temperature is -40 ~ -60℃. It can be used at 130℃ for a long time.

  1. Poly Tetra Fluoro Ethylene (PTFE)

PTFE is combined with the advantages of most plastic gasket materials, including temperature resistance from -95℃ to 232℃. Except for the free fluorine and alkali metals, it has excellent corrosion resistance to chemicals, solvents, hydroxides and acids. PTFE material can be filled with glass fiber. Its purpose is to reduce the cold fluidity and creep properties of PTFE.


1 Comment

  • SGcubNiwfhUH
    October 29, 2022



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