Raised Face SS304 ASME B16.20 Spiral Wound Gasket

Raised Face SS304 ASME B16.20 Spiral Wound Gasket

Spiral wound gaskets — made with an alternating combination of formedmetal wire and soft fillermaterials — form avery effective seal when compressed between two flanges.A V-shaped crown centered in the metal strip acts as a spring, giving the gaskets greater resiliency under varying conditions. Filler and wire material can be changed to accommodate different chemical compatibility requirements. If the load available to compress a gasket is limited, gasket construction and dimensions can be altered to provide an effective seal.

A spiral wound gasket may include a centering ring, an inner ring or both. The outer centering ring accurately positions the gasket within the flange and acts as a compression limiter, while the inner ring provides additional radial strength. The inner ring also reducesflange erosion and protects the sealing element.

Resiliency and strength make spiral woundgaskets an ideal choice under a variety of conditions and applications. Widely used throughout refineries and chemical processing plants, spiral wound gaskets are also effective for power generation, aerospace, and a variety of valve and specialty applications.

The ASME B16.20 gasket specification has been updated and changed to a new recommended standard. The new criteria incorporates a default to inner rings in all graphite-filled spiral wound gaskets unless the purchaser specifies otherwise. However, a graphite-filled spiral wound gasketwithout an inner ring will still be stamped with and in compliance to the ASME B16.20 standard.