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Member Since 23 Years
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Spiral wound gaskets are manufactured from V-shaped metal strips, spirally wound with an inlay of soft filler material between each turn. They form a very effective seal when compressed between two flanges. A V-shaped crown centered in the metal strip acts as a spring, giving gaskets greater resiliency under varying conditions. Filler and metal strip material can be changed to accommodate different chemical compatibility requirements. When spiral winding only (containing preformed metal and soft filler material) is used as a gasket, inner and outer diameters of winding are reinforced with several plies of metal without filler to give them greater stability. A spiral wound gasket may include a centering ring, an inner ring or both. The outer centering ring centers the gasket within the flange and acts as a compression limiter. The inner ring provides additional radial strength. The inner ring also reduces flange erosion and protects the sealing element. These gaskets are widely used in refineries, chemical processing plants, power generation, and a variety of valve and specialty applications. | |
Spiral wound gaskets may be used in place of solid metal oval or octagonal API ring joint gaskets when their gasket groove is badly worn out. The spiral wound gasket industry is currently adapting to a change in the specification covering spiral wound gaskets. Previously API 601, the new specification is ASME B16.20. These specifications are very similar. | |
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Malad West, Mumbai, Maharashtra 
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