Flange Alarm Valve With Stainless Steel Water Motor Gong

When the system is in the servo state, the groove or hole on the seat ring is covered and closed by the valve flap, and the alarm water channel leading to the hydraulic alarm bell is blocked; when the upper and lower pressure difference reaches a certain value, the valve flap opens ( Differential pressure start), the water flows from the water supply side to the system side, the alarm bell alarms, and the water extinguishing system sprays water; when the upper and lower pressures are frequently opened, there is a small water make-up valve on the valve disc. When leakage or water source pressure fluctuates, the water supply valve can be used to supply water to the pipe network to balance the pressure in the upper and lower chambers, stabilize the valve flap, and avoid false alarms.

2.1.3, hydraulic alarm bell

The hydraulic alarm is a hydraulically driven mechanical device. It is composed of shell, impeller, bell hammer and bell cover. When the valve flap is opened, the water flow enters the retarder through the grooves and small holes on the seat ring. After being full, it continues to flow to the water inlet of the hydraulic alarm bell. Under a certain water pressure, the impeller is pushed to drive the bell hammer to rotate, so that The bell hammer hits the aluminum bell continuously to sound an alarm bell.

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