Imported red silicone O-ring imported high-temperature O-rings, silicone O-ring 1, imports of O-ring, high temperature performance silicone elastomer can be said to be the best present. Silicone can be long-term use at 230 ℃, 250 ℃ under short-term use; elongation at break of the silicone rubber can be maintained at about 100%, the hardness of 90 to 95 degrees. Maintain its after aging at 350 ℃ hot air 16 hours of good elasticity, hot air aging at 400 ℃ after 110 minutes to maintain good elasticity, hot air aging at 400 ℃ after 110 minutes, spray containing carbon black, thermal black or carbon fiber rubber elongation increased by about 1 / 2-1 / 3, the intensity decreased about 1/2, still maintain good flexibility. 2, imported high-temperature O-ring material selection: O-ring long-term work environment at 100 degrees can use NBR nitrile rubber O-ring, O-ring long-term work environment at 130 degrees or less can use EPDM ternary B propylene rubber O-ring, O-ring long-term work environment at 220 degrees below can be used FKM fluorine rubber O-ring, O-ring long-term work environment at 230 degrees or less can use SIL silicone O-ring, O-ring long-term work environment at 280 degrees below can be used FFKM perfluorinated rubber O-ring. 3, silicone O-ring main features: a good air tightness, two good heat resistance, three oil good performance, four waterproof performance, outstanding abrasion resistance 5, 6 adhesion..... better. NBR imported oil, wear O-ring performance Description: 1. Imported Nitrile O-ring has a low density and high filling; 2. imports of nitrile rubber has excellent resistance to aging, was praised as no cracks rubber; 3. Imported NBR O-ring has good flexibility and resistance to compression deformation; 2.4 nitrile rubber O-ring is the toughness of the best rubber seals. 5. import is essentially NBR O-ring nonpolar, so EPDM EPDM O-ring on the polar solvents and chemicals with strong resistance and good insulation properties, but less dense water. 3.6.NBR NBR O-ring NBR material structure composed of ethylene, propylene and non-conjugated diene polymerization. NBR NBR main polymer chain is fully saturated, this feature makes NBR NBR EPDM O-ring is resistant to heat, light, oxygen, etc., in particular ozone.