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NBR nitrile rubber seals for: in the petroleum-based hydraulic oil, glycol-based hydraulic oil, the two ester-based lubricants, gasoline, water, silicone grease, silicone oil and other media used. Is currently the most widely used and lowest cost of rubber seals. The discomfort for polar solvents such as ketones, ozone, a nitro hydrocarbon, MEK and chloroform. General temperature range of -40 ~ 120 ℃.
HNBR hydrogenated nitrile rubber seals: excellent corrosion-resistant, tear-resistant and anti-compression deformation characteristics, ozone resistance, resistance to sunlight, good weather resistance. Better abrasion resistance than nitrile rubber. Suitable for washing machinery, automobile engine system and the use of new environmentally friendly refrigerant R134a refrigeration system. Not recommended for use in the solution of the alcohols, esters or aromatic. General temperature range -40 of 150 ° C.
VMQ silicone rubber ring: having excellent heat resistance, cold resistance, ozone resistance, resistance to atmospheric aging. Have a good insulating performance. However, tensile strength than ordinary rubber of no oil resistance. Apply to home appliances such as electric water heaters, electric irons, microwave ovens. Also applies to the various supplies that have come into contact with the human body, such as kettles, water dispensers. Is not recommended to use in the most concentrated solvents, oils, concentrated acid and sodium hydroxide. General temperature range of -55 ~ 250 ℃.
FKM fluorocarbon rubber seals: temperature resistance is superior to silicon rubber, has excellent weather resistance, ozone resistance, and chemical resistance, cold resistance is bad. For the large part of the oil and solvent resistance, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils. Suitable for diesel engines, fuel systems, and chemical plants, a sealing needs. Not recommended in ketones, low molecular weight esters, and a mixture containing nitrate. General temperature range of -20 ~ 250 ℃.
EPDM rubber seals: EPDM having good weather resistance, ozone resistance, water resistance and chemical resistance. Alcohols and ketones can be used, the seal can also be used for high-temperature steam environment. Suitable for sanitary equipment, automobile radiators and auto brake system. Not recommended for food use or exposure to mineral oil. General temperature range of -55 ~ 150 ℃.
CR neoprene seals: resistance to sunlight, weather-resistant performance is particularly good. Afraid dichlorodifluoromethane and ammonia refrigerant, resistance to acid, resistance to grease-based lubricants, large but low aniline point mineral oil expansion. Easy to crystallize at low temperatures, hardening. Applies to all kinds of contact with the atmosphere, sunlight, ozone environment and a variety of flame, chemical resistant seal links. Does not recommend the use of acid, nitro hydrocarbons, esters, chloroform and ketones chemicals. General temperature range of -55 ~ 120 ℃.
IIR Butyl rubber seals: particularly good air tightness, heat resistance, good sunlight, ozone resistance, good insulation properties; polar solvents such as alcohols, ketones, esters and other good resistance, can be exposed to the action vegetable or may oxides. Suitable for chemical resistance or vacuum equipment. Is not recommended to use petroleum solvents, kerosene or aromatics. General temperature range of -50 ~ 110 ℃.
ACM acrylate rubber seals: oil has excellent resistance, high temperature resistance, weather resistance are good, but the mechanical strength, compression deformation rate and water resistance somewhat less. Generally used in automobile transmission and power steering systems. Does not apply to hot water, brake fluid into the phosphate. General temperature range of -25 ~ 170 ℃.
NR natural rubber seals: a good abrasion resistance, flexibility, tensile strength and elongation. Aging, but in the air easily become sticky when exposed to heat, easy expansion and dissolved in mineral oil or gasoline, the alkali but impatience strong acid. Suitable for use in automotive brake oil, ethanol, etc. there are hydroxide ions liquid. General temperature range of -20 ~ 100 ℃.
PU polyurethane seals: mechanical properties of the polyurethane is very good, wear-resistant, resistant to high-pressure properties are far superior to other rubber. Aging resistance, ozone resistance, oil resistance is also quite good, but the high temperature is easily hydrolyzed. Generally used for high pressure resistance, wear sealed links, such as hydraulic cylinders. General temperature range of -45 ~ 110 ℃.
FFKM the perfluoroelastomers: very excellent resistance to chemical corrosion, acid, alkali, ketones, esters, ethers, and strong oxidizing agents, the vast majority of chemicals. The highest heat resistance to 320 ℃. Usually for the ultimate solution sealing problems, the price of nearly a hundred times of general rubber, very expensive.
PTFE polytetrafluoroethylene: excellent chemical resistance and heat resistance, can be applied to wide in almost all occasions, air, light, ozone, temperature range from -200 ° C to 250 ° C of friction is small, no adhesion