Product introduction
The diaphragm alarm valve is one type of deluge alarm valve. Deluge alarm system is composed of deluge alarm valve and pipe network with opening sprinkler together.
The diaphragm alarm valve is using rubber diaphragm to separate water supply chamber and system chamber and controlling the high and lower of the water pressure in chamber to open and close the diaphragm and control the water flow’s turn-off and on-state. When it is in a ready condition the water pressure in the control chamber equals to the supply water’s pressure so the diaphragm will be in close state and water cannot enter into the side of the system. When a fire occurs the electromagnetic valve will be started to decompress the pressure of the control chamber. The chamber of supply water will be directly pressed by the pressure of the supply water and diaphragm will be opened then water will be flowed into the system chamber and system pipe network to extinguish the fire.
Operation instruction
Condition of standing by: The electromagnetic valve and driver are normally closed. Open reset ball valve A and the pressure water in water supply side will enter into the control room by connected pipe and give pressure by water filling. When the two pressure gages reach equilibrium the valve will be closed. Close reset valve A and it is in a condition of standing by.
Start electronic control:When the electromagnetic valve is charged with electricity, the driver will be released. Because the driver’s water flow pipe’s diameter is larger than the restrictor aperture the water volume filled into the control chamber through restrictor eyelet is far less than the amount of flowing into the control chamber which decompresses the pressure of the control room and then the diaphragm will be opened and the valve will be started. To avoid deluge alarm valve to be switched off automatically reset ball valve A must be in close state when electromagnetic valve is powered off.
Manually start:
When the linkage system was failure or power off please open the emergency switch box and open the emergency manual ball valve B which can decompress the pressure of control room and open the valve.
Reset of the deluge alarm valve:
The deluge alarm valve can be reset by opening the reset ball valve A. Close the reset ball valve A after resetting.
C is alarm ball valve and shall be opened in the condition of standing by.
D is test alarm ball valve and shall be closed in the condition of standing by.
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