First, the material is different
The metal spiral wound gasket is made of V-shaped or W-shaped thin steel strip alternately wrapped with graphite, asbestos and tetrafluoroethylene. The structural density can be made according to different locking force requirements, and the inner and outer steel rings are used to control the maximum pressure. Tightness, the surface precision of the flange sealing surface of the gasket contact is not high, and it is the gasket with the best resilience in the semi-metal mat.
Graphite gaskets are cut or stamped from pure graphite or metal (toothed, flat, mesh) reinforced graphite sheets with excellent sealing properties.
Second, the scope of application is different
The metal spiral wound gasket is suitable for occasions where the load is uneven, the joint force is easy to relax, the temperature and pressure are periodically changed, and there is shock or vibration. It is used in the sealing of flanges, valves, pressure vessels, condensers, heat exchangers, towers, manholes, hand holes, etc. in petroleum, chemical, metallurgy, electric power, shipbuilding, machinery and other industries.
Graphite gaskets are used for long-term stability under severe operating conditions and require minimal maintenance. Widely used in pipelines, valves, pumps, pressure vessels, heat exchangers, condensers, generators, air compressors, exhaust pipes, refrigerators, etc.