The main function of the cartridge
Foam Fire Extinguisher is to extinguish Class A (solid material) and Class B (liquid) fires. It is particularly suitable for extinguishing fires caused by solid materials such as wood and cotton cloth, as well as fires caused by flammable liquids such as gasoline and diesel.
Working principle
The cartridge foam
Fire Extinguisher produces foam containing carbon dioxide by mixing a mixed solution of sodium bicarbonate (baking soda) and a foaming agent with an aluminum sulfate solution. These foams are sprayed out from the nozzle at a certain pressure, covering the surface of the burning object and isolating the air, thereby achieving the effect of extinguishing the fire.
Usage and precautions
Before use, make sure that the fire extinguisher is in a dry, cool, ventilated environment and easy to access. Avoid places with high temperatures or possible exposure to the sun to prevent carbonic acid from decomposing and becoming ineffective.
Before use, check whether the nozzle is unobstructed and make sure there is no blockage.
For electrical fires, the power supply should be cut off first because the foam is conductive.
When using, keep the fire extinguisher vertical, hold the opening pressure handle tightly, and spray at the most violent burning area.
Scope of application and limitations
Cylinder-type foam fire extinguishers are suitable for extinguishing fires of solid materials such as wood and cotton cloth, as well as flammable liquid fires such as gasoline and diesel. However, it cannot be used to extinguish water-soluble flammable liquids (such as alcohol, ester, ether, ketone, etc.) and live equipment (unless a special nozzle is used). In addition, when using a foam fire extinguisher, attention should be paid to its conductivity to avoid using it in an electrical fire without cutting off the power supply.
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