Meet the standard requirements of the experimental outline of the backpack spray fire extinguishing gun. The water mist fire extinguishing gun has low working pressure, compact structure and lightness, so as to make a backpack, convenient to achieve the purpose of fire fighting in different environments, with its unique technology and safe, reliable and convenient operation, to achieve more than similar fire extinguishing equipment energy saving 1/3 efficiency. It is a new generation fire extinguishing device with more combat effectiveness. Water Mist fire extinguishing gun is a fire extinguishing medium with a certain pressure to form a mixture of air gas, so as to achieve the purpose of fire extinguishing, especially in the initial fire rescue process.Cylinder working Volume: 3 L; nominal pressure of cylinder: 30MPa; bucket volume: 13.9L; bucket working pressure: 0.8MPa; Range: DC 15.2m, spray 9.2m; injection Time: DC 51.6s, spray: 53.2s; bucket storage, Voltage reducer safety valve opening pressure: 1.1~1.2mpa total weight (full of fire extinguishing agent and compressed air): 30.94kg. Easy to use and fast. Can extinguish 3 A, 144B fire.