Spiral Wound Metal Gasket Material: Metal tape + Expanded Graphite / PTFE Spiral wound metal gasket : Spiral wound gasket ( ... ) is made by superposing, winding and welding V-type or W-type stainless steel tape and non-metallic filing. It is usually ... ,316L,321,Ta Mon400, Inconel, asbestos (graphite, PTFE, mica, ceramic) tape used for special-purposed equipments.Equipment: It is used as ...