1)spiral wound gasket is devided into A,B,C,D four styles 2) ... spiral wound gasket:Metal spiral wound gasket is made of high-quality alloy strips or stainless strips with V or W-shaped alternately spiral wound, taking graphite, asbestos and ... , shipbuilding & pipeline, valves, pumps, pressure vessels, condensers, towers, manholes, handholes, and so on. With high mechanical strength, easy-to-use, good ...