Non-metallic gasket: A gasket made of non-metallic materials such as asbestos, rubber, and synthetic resin. Non-metallic jacket gasket: A non-metallic gasket with an outer layer of synthetic resin, etc.
Semi-metallic gasket: A gasket made of both metallic and non-metallic materials, such as spiral wound gaskets and metal-jacketed gaskets.
1. Spiral wound gasket: A gasket made by spirally winding a non-metallic strip sandwiched between metal strips with V-shaped or W-shaped cross-sections.
(1) Inner ring: A metal ring located on the inner ring of the spiral wound gasket.
(2) Outer ring: A metal ring located on the outer ring of the spiral wound gasket.
2. Metal-jacketed
Metallic gasket: A gasket made of metals such as steel, aluminum, copper, nickel, or Monel alloy.