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HMZSFZ wet alarm valve system is a commonly used fixed fire extinguishing system in automatic sprinkler fire extinguishing systems. It consists of wet alarm valve (including valve group, hydraulic alarm bell, delayer, pressure switch, etc.), water flow indicator, fire signal valve and It consists of closed nozzles, etc. The system is in standby mode for a long time, and the pipe network is filled with pressurized water. When a fire occurs somewhere in the protection area, the ambient temperature rises, causing the temperature-sensitive element (glass ball) on the nozzle head to act, the sealing component falls off, and the system automatically starts , spray water directly to the fire area and send out an alarm signal to achieve the purpose of alarm, fire extinguishing and fire control. It is suitable for buildings that can use water to extinguish fire. It is usually installed in production sites, warehouses, hotels, shopping malls, hospitals, theaters, office buildings, high-rise buildings and garages with fire risks.