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| Spiral Wound Gasket Installation Procedures |
Spiral wound gaskets are used in industry as static seals in flanged joints, pumps and valves. They are typically well-suited to high pressures and temperatures, but require careful installation if they are to provide leak-free sealing.
.Inner Ring
Spiral wound gaskets consist of a solid metal outer ring and, in some cases, a solid metal inner ring to retain the spiral winding. It is recommended that a gasket with an inner ring is installed, unless space constraints dictate otherwise.
Mechanical Damage
Excessive pulling or pushing on a spiral wound gasket can cause mechanical damage, particularly if the gasket is filled with polytetrafluoroethylene (PTFE) or flexible graphite. The gasket should be installed so that its inside and outside diameter is confined to prevent buckling and promote better sealing.
Winding
To function properly, the winding portion of a spiral wound gasket must be compressed across its entire surface. The American Society of Mechanical Engineers (ASME) publishes a standard for connection types and corresponding sizes and classes for spiral wound gaskets.
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