APG Spiral Wound Gasket, RWI, Series: Style 7GSW4, 4 in Nominal, Class: Class 300, 304 Stainless Steel/Graphite

Spiral wound gaskets are special semi-metallic gaskets of great strength and resilience, therefore they are suitable for use under heavy operating conditions. Manufactured by spiral winding V-shaped metal strip and strip of non-metallic filler material. Spiral wound gaskets can be reinforced with an outer centering ring and/or inner retaining ring. Used for sealing flange joints, manhole and handhole covers, tube covers, boilers, heat exchangers, pressure vessels, pumps, compressors and valves.