Imported star-ring (X-ring), usually made of nitrile star-ring, fluorine rubber star-ring. Imported star-ring (X-ring) Description: Star-ring (the star-ring), also known as X-ring, which is the cross-section through a die to form four circular annular sealing lip ring, it On the basis of the star-ring performance has been improved and improved, can replace most of the star-ring applications. It is a kind of sealing member may both directions for sealing purposes. When installed in various forms of grooves in the radial or axial precompression imparting initial star-ring sealing capability, the pressure increases with increasing its sealing force. Under pressure, the star-ring cross-sectional shape causes a uniform pressure is transmitted to the various aspects, it has good sealing effect. Imported star-ring (X-rings) applications: dynamic sealing applications for sealing reciprocating pistons, piston, piston. For sealing oscillating, rotating or helical motion of shaft or spindle. Static sealing applications: Sealed radial stationary parts, such as sleeves, end caps, pipe. Seal axially stationary parts, such as flanges, covers and so on. Corrosion-resistant EPDM rubber EPDM English name abbreviation EP. EPDM common color is black, also can be made into any color barrier, as long as you provide a sample color number or company Wal-top that you can produce it. EPDM rubber containing no double bond in the main chain is fully saturated straight-chain structure, a diene Jing its side chain, and can be vulcanized with sulfur. EPDM has excellent resistance to aging, ozone resistance, weather resistance, heat resistance (120 ℃ environment in long-term use), chemical resistance (such as alcohols, acids, alkalis, oxidizing agents), but does not resistant to aliphatic and aromatic solvents erosion. EPDM rubber has the lowest density is high filling properties, but lack of self-adhesive and mutual adhesiveness. In addition, EPDM has outstanding resistance to steam performance, such as the production of steam-resistant diaphragm seal products. EPDM has been widely used in washing machines, televisions and accessories doors and windows sealed products, or more complex profile strip production. In terms of chemical acid corrosion generally fluorine rubber or EPDM star-ring, simply the difference between the two: fluorine rubber resistant to chemical energy is broader, fluorine rubber resistant to temperature will be higher, you can reached 240 degrees, and the star-ring EPDM can only reach 150 degrees, fluorine rubber oil tired medium can, and EPDM not. EPDM has the advantage of lower prices, and more for sewage treatment, or other water treatment products. Star resistant EPDM rubber seals in terms of: EPDM rubber itself is very superior performance in high temperature, wear resistance, corrosion resistance, and so have a very good reflection of their own tension deformation amount can reach more than 200%. But the drawback is that not come into contact with oil, such as gasoline, diesel fuel, hydraulic oil, etc. are not to be reached. The medium containing oil tired substance, then make the star-ring expands or eroded. Therefore, widely used in drinking water treatment, sewage treatment, other seals, and so does not contain oil occasions.