The barrel of portable dry powder fire extinguisher is made of high-quality carbon steel through special processing. This series of fire extinguishers has the advantages of simple structure, flexible operation, wide application, convenient use and low price. The fire extinguisher is mainly composed of cylinder, bottle head valve, spray hose (nozzle), etc. The fire extinguishing agent is sodium bicarbonate (ABC type is ammonium phosphate), the driving gas is carbon dioxide, and its working pressure is 1.5MPa at normal temperature. The wheeled dry powder fire extinguisher is mainly composed of cylinder, head assembly, nozzle assembly, frame assembly, etc. The fire extinguishing agent is sodium bicarbonate (ABC type is ammonium phosphate) dry powder fire extinguishing agent, the driving gas is nitrogen, and its working pressure is 1.5MPa at normal temperature.

Due to its large specific surface area and high activity, ultrafine fire extinguishing particles can be suspended in the air for several minutes to form relatively stable aerosols. Therefore, not only the fire extinguishing efficiency is very high, but also the use method is completely different from the general traditional dry powder fire extinguishing agent, which is similar to the haloalkane flooding fire extinguishing. For example, the extinguishing concentration of KHCO3 aerosol is only 2.0% of 1301 halogenated alkane, but its extinguishing efficiency is 50 times that of it, and the sediment after extinguishing is not obvious, causing little pollution to the fire site. KHCO3, NaCl, KCl, K2SO4, NH4H2PO4 and NaHCO3 can be used to prepare aerosol fire extinguishing agent. The particle size of aerosol fire extinguishing agent shall be less than<5 μ m. Better less than 0.5 μ m. Aerosol has become an independent new research field.