1. NBR nitrile rubber sealing ring: suitable for crude oil series gear oil, mellow series gear oil, diester series grease, automotive gasoline, water, silicone lubricating grease, methyl silicone oil and other substances. It is the most widely used rubber product with the least cost at this stage. Not suitable for use with polar solvents such as macrolides, reactive oxygen species, nitro hydrocarbons, MEK and chloroform. The general application temperature range is -40~120℃. 2. HNBR esterified nitrile rubber sealing ring: It has excellent corrosion resistance, resilience and resistance to shrinkage and deformation, and has good resistance to active oxygen, sun and weather. Better abrasion resistance than nitrile rubber seals
. It is suitable for laundry equipment, engine system software and refrigeration units using the new environmental protection refrigerant R134a. Not recommended for use in aqueous solutions of aldehydes, lipids or alicyclics. The general application temperature range is -40~150℃. 3. SIL silicone rubber sealing ring: It has excellent high temperature resistance, low temperature resistance, active oxygen resistance and air embrittlement resistance. Has very good dielectric strength properties. However, the compressive strength is worse than that of general vulcanized rubber and there is no wear resistance. Applicable to electrical products such as domestic water heaters, irons, microwave heating, etc. It is also suitable for all kinds of utensils that touch the body, such as teapots, vertical water dispensers, etc. It is not recommended to be used in most extraction organic solvents, refined oil, concentrated acid and sodium hydroxide solution. The general application temperature range is -55~250℃. Fourth, VITON fluorine rubber sealing ring: heat resistance is better than silica gel, excellent aging resistance, active oxygen resistance and acid resistance, but poor cold resistance. Resistant to most refined oils and organic solvents, especially erythorbic acid, aliphatic hydrocarbons, aliphatic hydrocarbons and animal and vegetable oils. Applicable to the sealing requirements of diesel engines, raw material system software and chemical enterprises. Not recommended for macrolides, low molecular weight lipids and nitrous compounds. The general application temperature range is -20~250℃. 5. FLS fluorosilicone rubber sealing ring: It has the advantages of both fluorine vulcanized rubber and silica gel, and has good acid and alkali resistance, water washing resistance, light fuel oil resistance and high and low temperature resistance. It can resist the corrosion of chemical substances containing oxygen, organic solvents containing aliphatic hydrocarbons and organic solvents containing effective chlorine. Generally used for aviation, aerospace and defense main purposes. Exposure to macrolides and brake fluids is not recommended. The general application temperature range is -50~200℃. 6. EPDM EPDM rubber sealing ring: It has very good aging resistance, active oxygen resistance, abrasion resistance and acid resistance. It can be used for aldehydes and macrolides, and can also be used for sealing in the natural environment of high temperature water vapor. Applicable to bathroom accessories, car radiators and brake system software. Not recommended for primary food use or exposure to mineral oils. The general application temperature range is -55~150℃. Seven, CR neoprene rubber sealing ring: the sun resistance, weather resistance characteristics are particularly good. It is not afraid of refrigerants such as dichlorodifluoromethane and ammonia. It is resistant to dilute acid and heat-dissipating grease, but it has a large amount of swelling in mineral oil with low aniline point. It is easy to crystallize and harden at ultra-low temperature. It is suitable for various natural environments exposed to air, sun, active oxygen, and various sealing stages of flame retardancy and solvent corrosion resistance. Not recommended for use with strong bases, nitro hydrocarbons, lipids, chloroform and organic chemicals such as macrolides. The general application temperature range is -55~120℃. 8. IIR butyl rubber sealing ring: excellent sealing performance, high temperature resistance, sun resistance, active oxygen resistance, good dielectric strength; very good resistance to polar solvents such as alcohols, ketones, esters, etc. May be exposed to animal and vegetable oils or metal oxides. Suitable for chemical resistance or vacuum technology. Additional application with crude organic solvents, gasoline or para-xylene is not recommended. The general application temperature range is -50~110℃. 9. ACM acrylate rubber sealing ring: excellent resistance to refined oil, good heat resistance and aging resistance, but slightly weaker impact toughness, shrinkage deformation rate and wear resistance. It is generally used in car transmissions and driving power automobile steering systems. Uncomfortable use in boiling water, brake fluid, phosphate ester. The general application temperature range is -25~170℃. 10. NR pure natural rubber sealing ring: has very good wear resistance, ductility, tensile strength and elongation. However, it is very easy to embrittle in gas and become sticky when heated, and it is very easy to swell and melt in mineral oil or motor gasoline, and it is resistant to alkali but not strong alkali. It is suitable for application in automobile brake fluid, alcohol and other liquids with hydroxide ions. The general application temperature range is -20~100℃. 11. PU polyurethane rubber sealing ring: The physical properties of polyurethane vulcanized rubber are very good, and the wear resistance and high pressure resistance are far better than other vulcanized rubbers. The aging resistance, active oxygen resistance and wear resistance are also very good, but it is easy to hydrolyze at high temperature. Generally used for high pressure resistance, anti-wear sealing stage,such as hydraulic cylinders. The general application temperature range is -45~90℃. 12. Metal material rubber sealing ring: It is made of stainless steel wire, without all rubber components, and has strong application characteristics. For example: to maintain normal work in the natural environment such as high vacuum pump, high and low temperature test, strong radiation source, and various corrosion. The outer skin of the sealing ring is made of different materials such as stainless steel plate, copper, PTFE and other raw materials according to different main purposes. Very good, can be reused many times and so on. The sealing ring lining core is a prefabricated component produced by different wire diameters and relative densities, and is suitable for different gas pressure places. The general application range is -80~800℃. This type of sealing ring is more expensive because of the increased cost. However, the excellent characteristics and the general application in the natural environment have been unanimously recognized by everyone.
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