... 150. 300.600LB 3Material:WCB.304,306,304L,306L Ball Valve with Lockable Device DescriptionMaterials WCB.304,306,304L,306LNominal Size1 ... refinery as Steel Pipes, Pipe Fittings, Flange, Valves, Gasket, Petroleum Machinery, Fasteners. With the excellent product quality and professional ... friends from home and abroad to cooperate with us and create a bright future together Ball Valve with Lockable Device