Non metallic gaskets are gaskets made of non-metallic materials such as asbestos, rubber, synthetic resin, and polytetrafluoroethylene. A non-metallic jacket gasket wrapped with a layer of synthetic resin or other non-metallic gaskets.

Semimetallic gaskets are gaskets made of metal and non-metallic materials, such as spiral wound gaskets or metal clad gaskets. A spiral wound gasket is a gasket made by spirally winding a V-shaped or W-shaped section of metal tape with non-metallic tape. 1) The inner ring of the inner ring is set on the metal ring of the spiral wound gasket inner ring. 2) The outer ring of the outer ring is set on the metal ring of the spiral wound gasket outer ring. B Metal coating

A metal gasket is a gasket made of metals such as steel, aluminum, copper, nickel, or monel alloy.

Spiral wound gasket refers to a gasket that is wound into a circular shape with metal tape (usually V-shaped steel tape) and non-metallic tape. The metal tape and non-metallic tape are alternately wound, and due to their good elasticity, they are widely used in flange sealing structures in industries such as petrochemical, chemical, and power. Depending on the specific location, steel rings can be added to the inner or outer layer of the gasket to locate or strengthen it.