Wet System Alarm Check Valve
When a fire breaks out in the protected area of the automatic sprinkler system and the ambient temperature of the fire scene rises, the glass ball on the closed nozzle bursts (or is easily fused and financialized), and the nozzle opens to spray water to extinguish the fire. At this time, due to the drop in water pressure of the pipe network on the outlet side of the wet alarm valve, a pressure difference is formed, the valve disc assembly is opened, and the water source water is continuously replenished to the pipe network to extinguish the fire. A certain water pressure impacts the hydraulic alarm bell and sends out a continuous alarm sound. The pressure switch acts to connect the electrical contacts and the control center to give an alarm with sound and light, and at the same time start the main water supply pump for fire extinguishing.
Wet Alarm Check Vlave
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 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.
Specification
| Material | Body | Ductile iron |
| Clapper | SS304 w/NBR | |
| Pipes | SS304 | |
| Ball valve & strainer & check valve | Brass | |
| Water motor gong | SS304 | |
| Working pressure | 12 bar | |
| Sealing testing pressure | 24 bar | |
| Applicable temperature | 4°C to 70°C | |
| Installation | Vertically | |
| Flow switch contact capacity | DC24V,0.5A | |
| Connection | Flange × Flange | |
| Available Size | DN80 thru DN250 (3” thru 10”) | |
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