Wet alarm valve for fire fighting system

Wet alarm valve assembly:

Wet alarm valve, system side pressure gauge, water supply side pressure gauge, compensator, discharge test valve (normally closed), alarm control valve (normally open), alarm test valve (normally closed), filter, retarder, pressure switch, hydraulic alarm bell

Compensator: In order to cope with the micro-seepage and a small amount of leakage at the side of the system in the daily quasi-working state, the valve body makes a small amount of water replenishing from the lower cavity to the upper cavity through compensator, so as to maintain the pressure level of the upper and lower cavities all the time.

Alarm test valve: Test function of alarm valve and alarm function of alarm bell. Fire control valve

Delayer: inlet connected to the alarm line, exports and pressure switch, delay device should be installed before the filter, when the water distribution pipeline leakage occurs, can cause the disc of small open, make water into the warning line, due to water flow is small, can from the orifice discharge of delayer will not enter the hydraulic alarm and pressure switch, avoid false alarms.

Pressure switch: Pressure switch is a kind of pressure sensor, whose function is to convert the pressure signal of the system into electrical signal.

Hydraulic alarm: Driven by hydraulic power, water flows into the hydraulic alarm and forms a high-speed jet, impinges on the water wheel to drive the bell hammer to rotate rapidly, and strikes the bell cover to send out audible alarm.