... 2.low leakagerate,high quality 3.OEM is welcome 4.CE High quality Anti-sweat worm gear butterfly valve Model of valve:D371XBody of valve : cast iron ... Seal Test 0.60.6suitable medium Air, water, sewage, steam, gas, oil, etc. Drive type Manual, worm worm gear drive ... , gas drive, electric drive. Part name Material Body Cast iron, nodular ...