deluge alarm valve(diaphragm style),fire valve,fire fighting system 1.Item No.:ZSFM100,150 2.ISO and CCCF certified deluge alarm valve(diaphragm style),fire valve,fire fighting system1.Nominal Diameter: 100mm,150mm2.Strength Test Pressure:4.8Mpa3.Nominal Working Pressure:1.2Mpa4.Starting Time:15s5.Rub Prevention:0.07 deluge alarm valve(diaphragm style)