Flange Type Alarm Check Valve

The ZSFZ wet alarm valve is a one-way valve that only allows water to flow into the sprinkler system in one direction, and drives the supporting parts to alarm under the specified pressure and flow. The wet automatic sprinkler system composed of water flow indicator, pressure switch and sprinkler is a kind of fixed fire extinguishing system with extremely wide application. The pipe network of the system is filled with clean water under a certain pressure all year round, and it is in a waiting state for a long time. 

2.1.2 Retarder Chamber

The retarder is a cylindrical water storage container with a water inlet and a water outlet. The lower end has a water inlet, which is connected to the alarm port of the alarm valve, and the upper end has a water outlet, which is connected to a hydraulic alarm. Due to the fluctuations in the pressure of the water supply source of the system, the valve flap can be opened instantaneously. The water flows through the grooves and small holes on the seat ring and first enters the retarder. Because the water source pressure fluctuates for a short time, the valve flap can automatically reset soon. (Closed), so the amount of water entering the retarder is very small. The water can be collected by the retarder and drained through the drain at the bottom. The buffer time of the retarder prevents the water pressure fluctuations from causing the error of the hydraulic alarm. Call the police. The time required for water to flow from the water inlet of the retarder to the water outlet is the delay time, this device is 5~90S, after the water flow stops, the water left in the retarder is discharged from the drain port, and the required time for draining (draining time) ) Less than 5min

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