... gas. 3.Certification:CE. Durable Forged Brass Check Valve.1.Model No. : LDM-CV042.Material: Body Brass,Hpb57-3,Hpb59-3,CW614n,CW617n ... , CuZn39pb3,,CuZn40pb2,CW3770,DZR. Stem Brass Stem, Brass as ... Production to ensure the Delivery and Quality!We smelt the brass bars,make the hot forging,machining and CNC processing,assembly ...