Dry Chemical Portable Fire Extinguisher are used to protect areas where Class A (flammable solids), Class B (flammable liquids and gases) or Class C (energized electrical equipment) fires may occur. It can be divided into two forms: Stored Pressure and Cartridge Operated. Stored Pressure is to directly fill the driving gas into the reagent bottle; Cartridge Operated is to separately configure a drive cylinder outside the reagent bottle. Because of the external drive cylinder, the color spraying distance of the standby type of fire extinguisher with the same medium and weight is far from the self-pressure type, which can better protect the personal safety of the fire extinguisher holder.