... 2.DN100,125,150 3.working pressure:1.2mpa deluge valve (automatic alarm valve)1.Material: Cast Iron 2.Size: DN100mm, 150mm,200mm3 ... .Type: Wet 4.Automatic Hydraulic Operated Nominal diameter: 100mm, 150mm, 200mmFlow ... bell : >80db Suitable temperature:4~80°CAutomatic fire deluge valve for fire prevention is a kind of lever-type structure ...