Rubber ring seal flexible waterproof casing special rubber ring seal gasket stretch ..

Material: nitrile rubber, neoprene, Viton. Hardness: I type: 50 ± 5 degrees, type II: 70 ± 5 degrees. Physical properties shall comply with HG / T3091-2000 standards. Ring should be no bubbles, it should not affect its performance surface defects or irregularities. Molded seals should be used when a large seal needs the joint interface angle of 30-45 °; the wrong side should be less than 2% d, interfaces strength test should be carried out, the failure should be re-connected. Rubber seal material analysis: 1, Viton: high temperature resistance, can be -30 ℃ - + 250 ℃ environment use, strong anti-oxidant, oil, acid and alkali. Typically used for high temperature, high vacuum and high-pressure environments, suitable for oil environment. Due to a variety of excellent performance, fluorine rubber is widely used in petroleum, chemical, aviation, aerospace and other sectors. 2, silicone rubber: has outstanding resistance to high temperature performance, -70 ℃ - maintain a good use of flexibility within the temperature range of + 260 ℃, and there is resistance to ozone, weathering, etc., suitable for thermo-mechanical sealing liner mat. Due to be made without any toxic insulation, insulation products and medical rubber products. 3, neoprene: good oil resistance, solvent resistance, chemical media and other properties, but the impatience of aromatic oil, which is characterized by a weathering resistance and excellent aging properties of ozone. Production usually neoprene diaphragm and seal doors and windows and general vacuum sealing products; 4, EPDM: good temperature resistance, a weathering and aging properties of ozone, usually doors and windows sealed, the automobile industry the most widely used. 5, PTFE and PTFE gaskets are high-quality full synthetic rubber for the material, using a special production process compounded by new sealing material, which combines the PTFE and rubber respective excellent characteristics, so Products not only has excellent resistance to corrosion, and high temperature, non-toxic, anti-adhesive, but also has good elasticity and tightness.