Difference of Types O-ring

The types of non-metallic gaskets are generally: fluorine rubber gasket, rubber gasket, silicone rubber gasket, metal wound gasket, neoprene rubber gasket, butaneyl rubber gasket, glass fiber gasket, plastic polymer gasket, tetrafluoride gasket, nylon gasket, graphite metal composite gasket. Spacers for specific applications may contain asbestos.
1. NR has good corrosion resistance to weak acid and alkali, salt and chloride solutions, but poor corrosion resistance to oil and solvent, so it is not recommended to be used in ozone media. The recommended operating temperature is -57 ° C to 93 ° C.
2. Neoprene CR Neoprene is a synthetic rubber designed to resist moderately corrosive acid, alkali and salt solutions. Good corrosion resistance to commercial oils and fuels. However, the corrosion resistance of strong oxidizing acids, aromatic hydrocarbons and chlorinated hydrocarbons is poor. Recommended operating temperature -51 ° C to 121 ° C.
3. NBR Butadiene rubber is a synthetic rubber with excellent corrosion resistance to oils, solvents, aromatic hydrocarbons, basic hydrocarbons, petroleum and natural gas over a wide temperature range. It has good corrosion resistance to hydroxides, salts and near neutral acids. However, its corrosion resistance is poor in strong oxidizing media, chlorinated hydrocarbons, ketones and lipids, and the recommended operating temperature is 51℃~121℃.
4. Fluoroprene fluoroprene rubber compound is composed of binary and ternary fluoroprene rubber adding coordination agent, vulcanizing agent by mixing. In addition to excellent heat resistance, medium resistance, and good physical and mechanical properties, it also has low compression permanent deformation, good elasticity and long service life. Fluorine rubber has outstanding heat resistance (200 ~ 250℃), oil resistance, can be used to manufacture cylinder liner sealing ring, rubber bowl and rotary lip sealing ring, can significantly improve the service time. Recommended operating temperature -40 ° C to 232 ° C.
5. Chloro-sulfonylated polyethylene synthetic rubber has good corrosion resistance to acid, alkali and salt solutions, and is not affected by climate, light, ozone, commercial fuels (such as diesel and kerosene). However, it is not suitable for aromatic hydrocarbons, chlorinated hydrocarbons, chromic acids and nitric acids. Recommended operating temperature -45 ° C to 135 ° C.
6. Silicone rubber silicone rubber has outstanding high and low temperature resistance, can be used at 150℃ for a long time without performance changes; It can be used continuously at 200℃ for 10000 hours, and can maintain its unique advantages of elasticity, ozone resistance and weather resistance in the working temperature range of -70 ~ 260℃. It is suitable for making sealing gasket needed in hot mechanism, such as sealing ring, valve gasket and oil seal (suitable for water medium), etc. Special silicone rubber can make oil seal.
7. Ethylene propylene rubber has good corrosion resistance to strong acid, alkali, salt and chloride solutions. However, it is not suitable for oils, solvents, aromatic hydrocarbons and hydrocarbons. The recommended operating temperature is -57 ° C to 176 ° C.
8. Graphite The material does not contain resin or inorganic graphite materials, can be divided into metal or not mixed with metal elements graphite materials. The material can be bonded to make pipe gaskets over 600MM in diameter. Excellent corrosion resistance to many acids, bases, salts and organic compounds and heat transfer solutions, even high temperature solutions. It cannot melt, but will sublimate above 3316 ° C. At high temperature, the material should be used carefully in strong oxidizing media. In addition to gaskets, the material can also be used to make filler and non-metallic winding tape in wound gaskets.
9. Ceramic fiber, ceramic fiber formed on strip is an excellent gasket material suitable for high temperature and low pressure conditions and light flange conditions. The recommended operating temperature is 1093℃. It can be used to make non-metallic winding tape in winding gasket.
10. Teflon combines the advantages of most plastic gasket materials, including temperature resistance from -95 ° C to 232 ° C. In addition to free fluorine and alkali metals, it has excellent corrosion resistance to chemicals, solvents, hydroxides and acids. PTFE material can be filled with glass, the purpose of which is to reduce the cold flow and creep property of PTFE.

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