Butterfly valve Type of actuator : handle,electric,peneauatic and liquid-drving. Nominal Diameter : DN25mm~DN1200mm Nominal Pressure : 0.1***ˇ«2.5*** Body material : cast iron,ductile,cast steel,stainless steel,alloy steel. Suitable Medium : fresh water,waste water,sea water,vapour,gas,oils,acid and alkaline.