With the development and requirement of modern industry, the manufacturing technology of spiral wound gaskets has also been greatly changed. The outer winding metal spiral gasket is a new type of spiral wound gasket. The outer ring metal spiral wound gasket has good compression performance, good resilience, multi-channel sealing and self tightening function. It is not very sensitive to the surface defects of the flange pressing surface, and does not bond the flange sealing surface. It can partially eliminate the influence of pressure, temperature change and mechanical vibration.
The outer ring metal winding gasket can keep the sealing performance under various harsh conditions such as high temperature, low temperature, high vacuum, shock vibration and other cyclic alternating conditions. The use of equipment: petroleum, chemical, metallurgy, power, shipbuilding, gas, nuclear power, nuclear power, aerospace, textile, medicine, machinery and other industries, such as pipes, valves, pressure vessels, condensers, heat exchangers, towers, Manholes, hand holes, and other static sealing parts.
The outer ring metal winding gasket is a cold rolled steel strip with a thickness of 0.15mm~0.25mm, or is determined by negotiation between the supply and demand parties. The metal belt type V or type W narrowband pre forming, the surface should be smooth, clean, should not be rough. Crack. Scratch. Pits and rusty stain; stainless steel hardness value HV = 200; winding metal band; non-metallic filler for special asbestos belt, flexible graphite, PTFE tape non asbestos fiber, belt, and mica tape etc.. The thickness of the band is 0.3-1.0mm. Asbestos loss must be less than or equal to 25%; non metallic chloride ion content is less than 100PPM.