China 4 Inch Fire Sprinkler System Valve Alarm Valve

4 Inch fire sprinkler system valve alarm valve
Introduction:
ZSFZ Wet alarm valve is the key component of automatic sprinkler system. It consist of wet alarm valves, retard, water alarm, and other components (such as pressure switches, flow meters, closed head etc.). The system usually in standby state, the pressure pipe filled with water. When the fire starts and environmental temperature rise, lead to the fire sprinkler sensitive element (glass ball) action, sealing components off, auto start the wet system, water directly sprayed into the fire area and send alarm signals to the control center. It's widely used in some fire danger places(4 ºC to 70ºC environment temperature), such as warehouse, hotel, mall, office or high building and garage etc.warehouses, hotels, shopping malls, hospitals, theaters, office buildings, high-rise building and garage.
Technical parameters:

ModelZSFZ80ZSFZ100ZSFZ125ZSFZ150ZSFZ200ZSFZ250Norminial diameter(mm)80100125150200250Working pressure(Mpa)1.6MpaSealed test(Mpa)3.2MpaStrength test(Mpa)6.4MpaFlow rate(L/min)15<Q<60Retard alarm time(s)5~90Friction resistance(Mpa)≤0.035Height of alarm valve(mm)250260265270370430Outside diameter of flange(mm)200220250285340405Inside diameter of flange screw hole(mm)160180210240295355Diameter of screw hole(mm)812Quantity of screw hole182226

Wet alarm check valve structure
Installation graphics

Other Firefighting Equipment