5 Kg/5kg Carbondioxide Fire Extinguisher (CO2) - Red

A fire extinguisher containing carbon dioxide (CO2) is used to extinguish fires involving flammable liquids (Class B) and live electrical equipment (Class C) because it displaces oxygen, smothering the flames, and its extremely cold discharge also cools the fuel. CO2 extinguishers are recognized by their black label, red cylinder, and a distinctive horn instead of a pressure gauge, and while effective, they can be dangerous if misused or used in confined spaces due to the risk of asphyxiation.  

How it Works

Oxygen Displacement:

The CO2 gas is discharged at high pressure, blanketing the fire and displacing the oxygen needed to keep it burning. 

Cooling:

As the gas is released, it expands rapidly and becomes very cold, creating "snow" and cooling the fuel source, which further helps to extinguish the fire. 

No Residue:

Unlike dry powder or foam, CO2 leaves no messy residue, making it ideal for delicate equipment like computers and servers. 

When to Use a CO2 Extinguisher

• Class B Fires: Fires involving flammable liquids such as petrol, paint, or oil. 

• Class C Fires: Fires involving live electrical equipment. 

• Delicate Equipment: Because they leave no residue, they are a preferred choice for fires involving computers, servers, and other sensitive electrical components. 

When NOT to Use a CO2 Extinguisher

Class A Fires:

Not recommended for ordinary combustible fires (Class A), which involve solids like wood and paper, as they may not displace enough oxygen to stop the smoldering and re-ignition. 

Chip Pan Fires:

Never use a CO2 extinguisher on a chip pan fire (a type of Class A fire). The force of the gas can spray the burning liquid out of the pan, spreading the fire. 

Confined Spaces:

Do not use in a small, confined area, as the gas can displace the available oxygen, leading to a risk of asphyxiation for anyone nearby. 

How to Identify a CO2 Extinguisher

• Black Label: A black banner or label on the red extinguisher cylinder. 

• Hard Horn: A distinctive, hard, flute-shaped horn instead of a pressure gauge.