zsfm series rain alarm valve of main valve, hydraulic alarm bell, pressure switch, manual ball valve, solenoid valve, three-way ball valve, anti-reset device and drainage system. the corresponding water spray fire extinguishing system can be composed of open sprinkler, water curtain sprinkler, closed sprinkler and fire alarm control system. the utility model has the advantages of simple structure, easy operation, safety and reliability, convenient installation and maintenance, etc. when a fire breaks out, the rain shower valve opens and the system sprinkler sprinkles automatically together. it can not only extinguish the fire source, but also spray water automatically on the whole protected area at the same time, so as to prevent the spread and expansion of the fire. it is suitable for buildings and sites with high fire risk which are easy to freeze or need to be protected.
