The difference between dry powder fire extinguishers and water based fire extinguishers

The difference between dry powder fire extinguishers and water based fire extinguishers

1. the composition is different: water-based fire extinguishers are mainly surfactants and stirred by pure water, and dry powder fire extinguishers are mainly ammonium phosphate.

2. the principle is different: water-based fire extinguisher spray into a water mist, reduce the temperature of the fire, quickly extinguish the fire; Dry powder fire extinguishers rely on the reaction of volatile decomposition of dry powder inorganic salts to chemically inhibit fire suppression.

3. Different levels. Water-based fire extinguishers are used for Class 1a solid fire extinguishing, and dry powder fire extinguishers are used for class a and Class b fire extinguishing.

4. Different uses: water-based fire extinguishers are suitable for the initial fire of flammable solids or liquids; Dry powder extinguishers can put out ordinary fires.

5. the degree of pollution is different: water-based fire extinguishers will not cause pollution to the fire scene, dry powder fire extinguishers will cause pollution to the fire scene.

Dry powder fire extinguisher

Dry powder fire extinguisher is a versatile fire extinguisher suitable for extinguishing all types of fires, including solid matter (such as wood, paper), liquid (such as gasoline, paint) and gas (such as natural gas, propane) fires. The dry powder in the fire extinguisher can cover the surface of the combustion, inhibit the oxidation reaction of the fire, and thus extinguish the flame. Dry powder fire extinguishers are easy to use and have remarkable effects, but they need to clean up dry powder residues after use, which may cause some pollution to the environment.

Water-based fire extinguisher:

Water-based fire extinguishers are mainly used to extinguish fires of solid substances (such as wood and paper). Water can cool the surface of the combustion, reducing the temperature, so as to achieve the effect of extinguishing the flame. Compared with dry powder fire extinguishers, water-based fire extinguishers are less polluting to the environment, but they are not suitable for liquid fires and electrical fires.