Stainless steel valve seal was achieved by which material?

by:AIRWOLF     2020-05-22
Stainless steel valve seal was achieved by which material? We all know that the stainless steel valve sealing quality determines the quality of products, stainless steel valves on the sealing technology to rely on outside force forced the ram pressure to the seat, to ensure the sealing surface sealing. And stainless steel valve is closed, sealing surface can only rely on medium pressure to seal, that depend on medium pressure, the disc will be to the other side of the valve seat sealing surface pressure to ensure that the sealing surface of the seal. Stainless steel valve sealing effect is good, U gasket has good elasticity. By full size design and passing ability. Brake effect is good, can effectively solve the containing block, particles and fibers medium brake break leakage phenomenon. In addition, the stainless steel valves convenient maintenance, without dismantling the valve to replace the valve seal. Non-metallic materials mainly to the production of stainless steel valves, used to make all kinds of shapes of seal, such as packing, gasket, o-ring, its basic function is to ensure that the valve's sealing, prevent the working medium from the flange connection, the valve stem and the relative motion of the stuffing box parts, leak outward. Therefore, used to make this kind of seal of the non-metallic materials shall meet the following requirements: 1. With the valve main material has the same corrosion resistance, and it itself of corrosion on the surface of the stem and other parts must be small; 2. In medium under the action of pressure and temperature, still have a certain strength and flexibility, and has good thermal stability, not easy ignition loss; 3. Valve under the condition of irradiation at work, have certain irradiation resistance, not easy irradiation ageing; 4. Friction coefficient is small, not easy to scratch the stem; 5. Good formability or processing performance. Stainless steel valve using non-metallic materials mainly include plastic, asbestos, rubber and graphite etc, and their working conditions should be considered to use, such as temperature, pressure, corrosive, radioactive, sometimes must be used with metal sealing material.
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