... , wear-resistant EPDM,NBR,PTFE,Viton Handle of valve : iron, punching malleable iron, aluminum handle Normal Diameter of valve: DN40-600 Normal Pressure of ... 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 ...