Spray pipe network action, water flow indicator and pressure switch that the first alarm
At the same time, a small part of the water into the hydraulic alarm and install the pressure switch pipe, hydraulic alarm on-site alarm, the pressure switch in the hydraulic pressure under the top of the alarm, to start the fire pump, to the fire site water supply, roof water tank Not in the water supply.
t this time the use of water is the roof of the fire source, due to spray action, water supply pipe water pressure decreases, resulting in water supply pipes and the main inlet pipe pressure difference between the upper and lower, then the alarm valve open, most of the water from the alarm valve into the water supply pipeline
After the nozzle reaches its intended temperature burst, the first is the flow of water in the pipeline, touch the water flow indicator (in fact, a micro switch), to the fire alarm host electrical signal, the host alarm
