Dry powder fire extinguishers are powered by liquid carbon dioxide or nitrogen gas, which drives the dry powder extinguishing agent inside the extinguisher to spray out to extinguish the fire. As a commonly used fire extinguishing equipment to extinguish the initial fire, there are two common types of BC and ABC. When equipped with these types of fire extinguishers, according to the specific use of the situation, mainly based on the use of combustible combustion, the difference between the choice of different types of dry powder fire extinguishers. 1, BC dry powder fire extinguishers. This type of fire extinguisher is filled with BC type dry powder, can extinguish BC type fire. It is suitable for the initial fire of flammable, combustible liquids, gases and electrically powered equipment, and is not suitable for the fire of solid materials. Therefore, in power distribution rooms, kitchens, machine rooms and other places where flammable liquid and gas fires and electrified fires are likely to occur, BC-type dry powder fire extinguishers can be equipped. Of course, such places can also be equipped with ABC dry powder fire extinguishers. 2、ABC dry powder fire extinguisher. This type of fire extinguisher can fight solid, liquid, gas fire, the widest range of applications. Can be used for all kinds of public **** occasions, office space, hotels, restaurants, cars, ships and even families, but shall not be used to fight light metal material fire. At present, the situation from the province, the problem is serious should be equipped with ABC dry powder fire extinguishers should be equipped with a large number of places wrongly equipped with BC dry powder fire extinguishers.
Dry powder fire extinguishers are mainly used to fight flammable liquids, combustible gases and electrical fires, and some are also suitable for fighting fires in wood, light metals and alkali metals. Dry powder fire extinguishers can be divided into: ordinary dry powder fire extinguishers; ultra-fine dry powder fire extinguishers in accordance with the type of filling dry powder extinguishing agent. The interior is equipped with dry powder extinguishing agent such as ammonium phosphate salt, this dry powder extinguishing agent has easy mobility, dryness, composed of inorganic salts and crushed dry additives, can effectively fight the initial fire.