Carbon dioxide Fire Extinguisher Refilling & Valve Changing Processes/Fire Extinguisher/ Amol Bahir

A carbon dioxide (CO2) fire extinguisher is a portable, active fire protection device that works by expelling carbon dioxide onto a fire. It works by displacing the oxygen the fire relies upon to continue burning, and it is primarily used to extinguish fires in which the source of the fuel is a flammable liquid or gas









Classes of fire

There are six classes of fire: Class A, Class B, Class C, Class D, ‘Electrical’, and Class F. –

– Class A fires – combustible materials: caused by flammable solids, such as wood, paper, and fabric
– Class B fires – flammable liquids: such as petrol, turpentine or paint
– Class C fires – flammable gases: like hydrogen, butane or methane
– Class D fires – combustible metals: chemicals such as magnesium, aluminium or potassium
– Electrical fires – electrical equipment: once the electrical item is removed, the fire changes class
– Class F fires – cooking oils: typically a chip-pan fire


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