Spiral wound gasket is a high-performance and high-reliability sealing gasket, usually made of "V"-shaped or "W"-shaped metal strips and non-metal strips overlapping each other, continuously wound, and the metal strips are fixed by spot welding at the beginning and end. There are many types of spiral wound gaskets, including metal spiral wound gaskets, graphite spiral wound gaskets, graphite metal spiral wound gaskets, metal asbestos spiral wound gaskets and metal PTFE spiral wound gaskets.