One, Nitrile rubber NBR sealing ring: suitable for oil hydraulic oils, glycol, hydraulic oils, diester lubricants, silicone oil, Silicon grease, gasoline, water and other media. Is currently the most widely used and costs a minimum of rubber seals. Does not apply to polar solvents, such as ketones hydrocarbons, ozone, Nitro, MEK and chloroform. General operational temperature range is-40~120℃.
Second, HNBR HNBR sealing ring: has excellent corrosion resistance, resistance to tearing and compression characteristics, resistance to ozone, sunlight and good weather. A better abrasion resistance than nitrile rubber. Suitable for washing machine, automobile engine systems and use of new environmentally friendly refrigerant R134a refrigerant in the system. Not recommended in alcohols, esters or aromatic solutions. General operational temperature range is-40~150℃.
Three, SIL silicone rubber seal ring: has excellent resistance to heat, cold, ozone, atmospheric properties. Has very good insulation properties. But poor tensile strength than regular rubber and no oil resistance. For household appliances such as electric heaters, electric irons, microwave ovens. Also applies to supplies of all kinds of contact with the human body, such as water bottles, drinking fountains, etc. Is not recommended in most solvent, oil, acid and sodium hydroxide. General operational temperature range is-55~250℃.
Four, VITON fluoroelastomer FKM seals: high temperature resistance than silicone, excellent weather resistance, ozone resistance and chemical resistance, cold resistance is bad. Resistant to most oils and solvents, particularly acids, aliphatic hydrocarbons, aromatic hydrocarbons and oils. Suitable for diesel engines, fuel systems and chemical sealing needs. Not recommended for ketones, low-molecular-weight esters and nitrate mixture. General operational temperature range is-20~250℃.