... DN200(8'') Clamp Butterfly Valve,Butterfly,high perfomance butterfly,fire fighting equipmentFeatures:1) Varieties: turbine signal butterfly valve, throw butterfly valve2) ... water supply safeness10) Nominal diameter: DN50(2"),DN65(2 1/2"),DN80(3"),DN100(4"),DN125(5"), DN150(6"), ... DN200(8") 11) Rated working pressure: 1.6Mpa 12) Strength test pressure:3.2Mpa 13) Working environment ...