The spiral wound gasket has good compression performance and good resilience performance. It has multiple seals and a certain self-tightening function. It is not very sensitive to the surface defects of the flange pressing surface. Without using the flange sealing surface, the pressure can be partially eliminated. Influence of temperature change and mechanical vibration; can be at high temperature. Low temperature. High vacuum. It maintains its excellent sealing performance under various harsh conditions such as shock and vibration.