Usually made of high-quality SUS304, SUS316 ("V" or "W" shape) stainless steel winding belts and graphite, asbestos, PTFE, non-asbestos and other soft materials alternately overlapped spirally wound, the metal belt is fixed by spot welding at the beginning and end, the basic type of metal spiral wound gasket does not have inner and outer rings, generally used in medium and low pressure tongue and groove surface and flat or concave and convex surface flanges.
The spiral wound gasket has good compression performance and rebound performance, has multiple sealing and certain self-tightening function, is not very sensitive to surface defects of the flange pressing surface, and can partially eliminate the influence of pressure, temperature changes and mechanical vibration; it can maintain its excellent sealing performance under various harsh conditions of high temperature, low temperature, high vacuum, impact vibration and other cyclic alternations.
It is used in the sealing of flange connections such as pipelines, valves, pressure vessels, condensers, heat exchangers, towers, manholes, handholes, etc. in the petroleum, chemical, metallurgy, electric power, shipbuilding, machinery and other industries.extrusion.
