1.Spiral wound gasket is formed of V-shaped of W-shape stainless steel stripe and soft nonmetallic packing or the material of flexible graphite asbestos, nonasbestos, PTFE etc by means of piled. it can use inner ring and outer ring as different material such as carbon steel , stainless steel 304, 316, 316L and etc . The static sealing element of pipe, valve, pump, thermal exchange, condensing motorcycle, auto vent-pipe, tower, plain hole and hole of flange, etc.
2. Spiral Without Inner And Outer Ring Suitable For Groove Flanges. These are suitable for large tongue and groove joints, large male and female joints. Recommended for valves high pressure pumps. Highly suitable for use where limited gasket sealing width is available.
3. Spiral With Only Outer Ring Used As Centering Device And Compression Stop This is a standard Spiral Wound Gasket consisting of a sealing element and a solid metal outer ring. The outer ring performs the following important functions. (A) Centers the gasket in the joints (B) Furnishes extra radial strength to help prevent gasket blow out (C) Resist Atmospheric conditions (D) Provides a gauge reference point for detemining compression during bolt pull up. This kind of gasket are used in (1) Raised Face And Raise d face Slip on joints (2) Plain or Flat Face Joints (3) Van Stone Joints (4) Lapped Joints (5) Welding neck Flanged joints
4. Spiral With Only Inner Ring used as a high pressure temperature capability - for groove flanges and general applications. This type of gaskets are used in Pressure vessels , Pumps, Boilers, Manholes, Caps, Covers etc.
5. Spiral With Inner And Outer Ring Of Solid Metal For High Pressure And Temperature Applications.. This are suitable for use with flat and raised face and recommended for high pressure temperature service, particularly where corrosive or toxic fluid are involved. Highly suitable for vaccum services.