The general explosion-proof flame-retardant rubber ring is suitable to be made of neoprene because of its excellent sun and weather resistance. It can be used in dichlorodifluoromethane, ammonia and other refrigerants. It is resistant to dilute acid and silicone grease lubricating oil, but it has large expansion in mineral oil with low aniline point. It is easy to crystallize and harden at low temperature. It can be used in various environments that are exposed to the atmosphere, sunlight, odor and itching, and various sealing links that are resistant to fire and chemical corrosion.
Note: It is not suitable for use in strong acids, nitrohydrocarbons, esters, chloroform and ketones. The general operating temperature range is - 55 ℃~120 ℃.
If the cost is considered, the nitrile rubber material is generally used, because this kind of material has strong usability and good flame retardancy. It is mainly used in petroleum hydraulic oil, glycol hydraulic oil, gasoline, water, silicone grease, silicone oil and other media. It is the most widely used and the lowest cost rubber sealing material at present.
Note: Not applicable to polar solvents, such as ketones, ozone, nitrohydrocarbons, MEK and chloroform. The normal operating temperature range is - 40 ℃~120 ℃.
Of course, butyl rubber can also be used. It has excellent air tightness, heat resistance, sunlight resistance, odor and itching resistance, and good insulation performance; It has good resistance to polar solvents such as alcohol, ketone, ester, etc., and can be exposed to animal and vegetable oil or itchy chemicals. It can be used in chemical resistant or vacuum equipment.
Note: It is not suitable to use with petroleum solvent, kerosene or aromatics. The general operating temperature range is - 50 ℃~110 ℃.
