1)spiral wound gasket is devided into A,B,C,D four styles 2) ... .etc Metal 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 ... , pumps, pressure vessels, condensers, towers, manholes, handholes, and so on. With high mechanical strength, easy-to-use, good compression and rebound ...