... (2'')-DN200(8'') Clamp Butterfly Valve,Butterfly,high perfomance butterfly,fire fighting equipmentFeatures:1) Varieties: turbine signal butterfly valve, throw ... an electric signal showing the on/off condition to the fire control center in order to guarantee water supply safeness10) ... 3"),DN100(4"),DN125(5"), DN150(6"), DN200(8") 11) Rated working pressure: 1.6Mpa 12) Strength test pressure:3.2Mpa ...