... butterfly,fire fighting equipment Nominal Dia.DN50(2'')-DN200(8'') Clamp Butterfly Valve,Butterfly,high perfomance butterfly,fire fighting equipmentFeatures:1 ... 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 temperature:4-70°C 14)Applicable ...