... high quality 3.OEM is welcome 4.CE High quality Anti-sweat worm gear butterfly valve Model of valve:D371XBody of valve : cast iron/ductile iron ... resistant EPDM,NBR,PTFE,Viton Handle of valve : iron, punching malleable iron, aluminum handle Normal Diameter of valve: DN25- 300 ... drive, electric drive. Part name Material Body Cast iron, nodular cast iron, cast steel, alloy steel, stainless steel Disc Ball ...