... Gasket Material: Metal tape + Expanded Graphite / PTFE Spiral wound metal gasket : Spiral wound gasket (basic type) is made by superposing, winding and ... stainless steel tape and non-metallic filing. It is usually wound by stainless steel, 304,304L,316,316L,321,Ta Mon400 ... , BS, JIS and EN(DIN) standards or client request. Spiral Wound Metal Gasket