Carbon Dioxide fire extinguishers are suitable for class B risks involving flammable liquids and especially for electrical hazards. CO2 is harmless to electrical equipment and is ideal for modern offices, electronic risks, and fires caused by the combustion of liquids such as: oils, fats, and solvents.
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CO2 extinguishers work by discharging carbon dioxide gas, which is stored in the extinguisher as liquid. When the handle is pressed, the gas is created by pressure. When the gas is sprayed, it comes out at high speed.
CO2 extinguishers are different in comparison to water and foam extinguishers in that they do not put out the fire by cooling down the fire. Instead, the CO2 that is sprayed replaces the Oxygen in the air around the fire which deprives it of fuel.
When using a CO2 extinguisher bear the following in mind: