Fire needs three things to burn: fuel, oxygen, and heat. Take away one or more of those three things in sufficient quantities, and the fire can no longer burn.
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A dry chemical fire extinguisher sprays a noncombustible, air resistant layer of foam designed to cover the fire's fuel source. When the fuel source (wood, oil, cloth, etc.) is completely and properly smothered, the expelled dry chemical foam isolates the fuel from the surrounding air, and thereby starves the fire of the oxygen it needs to burn.
FIRE extinguishers are used to put out fire.
A cold smoke. A really cold chemical.
It suffoctaes the fire by depriving the fire of air which it needs to burn.
A fire extinguisher stops a combustion reaction by removing one or more of the essential components of fire: heat, fuel, or oxygen. Different types of extinguishers work through various mechanisms; for example, water extinguishers cool the fire by absorbing heat, while foam extinguishers smother the flames, cutting off the oxygen supply. Dry chemical extinguishers interrupt the chemical reaction itself, effectively disrupting the combustion process. By targeting these elements, fire extinguishers effectively halt the fire's ability to sustain itself.
Multi-purpose fire extinguishers, like ABC, are typically dry chemical.
Chemical fire extinguishers are designed to suppress or extinguish fires by using various chemical agents that interrupt the combustion process. They can be effective against different types of fires, depending on their specific chemical composition, which may include dry chemicals, foam, or wet agents. These extinguishers work by cooling the flames, suffocating the fire, or chemically disrupting the reaction that sustains combustion. Proper selection and use of the appropriate type of chemical extinguisher are crucial for effective fire control.
D and K fire
Dry chemical fire extinguishers use a powder substance, such as sodium bicarbonate or monoammonium phosphate, to smother the fire and interrupt the chemical reaction. HCFC 123 fire extinguishers contain a clean agent called HFC-123, which is a halocarbon compound that extinguishes fires by removing heat and interrupting the chemical reaction. The main difference is in the extinguishing agent used, with dry chemical extinguishers being more versatile but leaving residue, while HCFC 123 extinguishers are cleaner and more suitable for sensitive equipment.
Different types of fire equipment are designed for various fire classes. For instance, water extinguishers are effective for ordinary combustibles (Class A fires), while foam extinguishers can address flammable liquids (Class B fires). For electrical fires (Class C), carbon dioxide (CO2) extinguishers are suitable, and dry chemical extinguishers can tackle multiple fire classes, including A, B, and C. Additionally, specialized equipment like Class D extinguishers is used for metal fires, and wet chemical extinguishers are ideal for cooking oil fires (Class K).
Nitrogen can be used in fire extinguishers as gas propellant.
They form a barrier on the surface of the burning substance - which melts to form an airtight layer - starving the fire of oxygen. Smother the fire
You can get fire extinguishers recharged at fire equipment companies, some hardware stores, and fire departments.