... safety valves,ball valves,butterfly valves,diaphragm valves,mud valve ect.And it has complete inspection equipment, such ... With 3D Eccentric structure ,the sealing ring of valve body adopts a multi-level structure of flexible ... material: WCB, CF3, CF8, CF3M, CF8M etc.6) Stem material: 410(1Cr13),420(2Cr13), 304, 316, 304L, 316L ... your confirmation before after place order. wafer type butterfly valve