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Materials Used in Seals and Gaskets

Seals and Gaskets

Polyurethane Offers outstanding abrasion resistance and tensile strength. Ideal for seals used under hydraulic pressure and applications where highly stressed parts are subject to wear. Hardness (Shore A) 90. Temperature Range: -60 to 225F
Teflon A tough, chemically-inert polymer possessing an incredible working temperature range. An excellent material for seals that are exposed to industrial chemicals and solvents. Temperature Range: -300 to 500F
Filled Teflon A special Teflon reinforced with various available fillers, well-suited for more severe applications such as piston rings, guide rings, bearings and shaft seals. Offers excellent chemical and heat resistance. Temperature Range: -300 to 500F
Fluorocarbon (Viton) Offers excellent resistance to petroleum products, solvents, and high temperatures. Excellent for a variety of applications, both static and dynamic, such as seals for automotive and aircraft fuel systems, hard vacuum service and other high temp uses. Hardness (Shore A): 90 Temperature Range: -20 to +400F
Buna N
(Nitrile) (NBR)
A widely used elastomer offering excellent resistance to oils, hydraulic fluids and fuels. ideal for applications in hydraulic and pneumatic systems. Hardness (Shore A): 90 Temperature Range: -40 to +250F
Ethylene-Propylene (EP) (EPOM) A copolymer which has gained wide seal industry acceptance for its excellent ozone and chemical resistance characteristics. It is ideal for outdoor weather-resistant uses. Hardness (Shore A): 90 Temperature Range: -60 to +300F
Aflas Exhibits excellent chemical resistance properties and good to fair high temperature retention of physical properties. Ideal for oil field, industrial and chemical applications. Hardness (Shore A): 90 Temperature Range: -23 to +400F
Nitrile, Hydrogenated (HNBR) HNBR is the product of hydrogenation of Nitrile. Ideal for all oil resistant applications, including exposure to such oil additives as detergents, anti-oxidants and anti-wear agents. Hardness (Shore A): 50-90 Temperature Range: -30 to +330F (Dry Heat Only)
Liquid Silicone Rubber (LSR) LSR offers a wide temperature range with long-term temperature resistance and low temperature flexibility It has good rubber-like properties - tensile strength, elongation, etc. - and excellent resistance to the damaging effects of UV light, ozone, O2, weather, lubricants with outstanding aging characteristics. Temperature Range: -94 to 400F
Composite Seals Combines the advantages of metal or plastic with the performance of elastomers. Offers added stability and durability.
Silicone A group of elastomers, made from silicon, oxygen, hydrogen and carbon, Silicones are renowned for their retention of flexibility and low compression set characteristics, within one of the widest working temperature ranges for elastomers.
Engineered Plastics i.e. Nylon, POM (Polyoxymethelene), Polyacetal, UHMW, Polyamide

This technical information has been contributed by
ExpresSeal

Click here to find suppliers

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