304/316 stainless steel Thread Check Valve 1.Investment casting technology 2.CNC lathe processed 3.SS304 ... ,welding nipple,hose nipple,socket,coupling etc.2.valves series: 1pc,2pc,3pc ball valve,flanged end ball valve,gate valve,check valve,globe valve,Y-strainer,sanitary valve ... Malleable iron pipe fittings such as elbow,tee,union,bushing,socket and so on5.Develop and design for curstomer special ...