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What is the CO2 fire extinguisher?

CO2 fire extinguishers (Carbon Dioxide) are a type of fire extinguisher that use carbon dioxide (CO2) as an extinguishing agent. CO2 is a clean, safe, and effective way to extinguish fires because it does not leave any residue and does not conduct electricity.

CO2 fire extinguisher is invented for extinguishing the Class B and C fire. The class B and C fires include the burning of liquids and electrical things. If the one out of three elements, is taken away from the fire triangle, the fire will be extinguished.

CO2 Fire Extinguisher
CO2 Fire Extinguisher

The principle on which CO2 fire extinguisher works is the same, it takes away the oxygen element of the fire triangle in order to knock it out.

Another speciality of carbon dioxide gas is its extreme cold effect, with which it cools the high temperature of fuel. It makes sure that the fire do not ignite again

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Co2 fire extinguisher types:

Every type of fire extinguisher is assigned with a specific color label on it to make it prominent. Black label is present on the CO2  extinguisher.

It has a Class B fire rating because it was specifically introduced for extinguishing the fires on flammable liquids. The other benefit of carbon dioxide gas is that it is a non- conducting gas, so it is useful on electric equipment as well. It’s usage is free from harm because it leaves no leftover.

Co2 fire extinguisher use:

CO2  extinguisher cut down the supply of oxygen gas from the fire triangle and extinguishes the fire by suffocating it. Then it cools down the fuel because it has an extreme cold temperature.

Sizes of CO2 Fire Extinguisher

CO2 fire extinguishers are available in various sizes to suit different applications and fire risks. The most common sizes of CO2 fire extinguishers are:

  1. 2 kg CO2 Fire Extinguisher: This is the smallest size of CO2- fire extinguisher and is ideal for use in small areas such as offices, server rooms, and laboratories.
  2. 3 kg CO2 Fire Extinguisher: This size of CO2- fire extinguisher is commonly used in commercial kitchens, workshops, and garages.
  3. 4.5kg 5 kg CO2 Fire Extinguisher: This size of CO2- fire extinguisher is suitable for use in larger industrial and commercial environments, such as factories and warehouses.
  4. 10 kg,25 kg,50 kg CO2 Fire Extinguisher: This is the largest size of CO2 -fire extinguisher and is designed for use in high-risk areas such as oil refineries, chemical plants, and other large industrial settings.

Co2 fire extinguisher details:

The container of CO2  extinguisher is filled with highly pressurized carbon dioxide gas. Due to the high pressure it becomes liquid in the container but released as a gas for suppressing the fire. It contains a hard horn and do not contains a pressure gauge. The dry ice comes out of the horn while using the fire extinguisher because of the high pressure of carbon dioxide.

CO2 fire extinguisher pressure:

Carbon dioxide in stored at a pressure of 55 bars or 825 psi in the cylinder. At this pressure the gas turns into liquid. When the lever of fire extinguisher is operated, the diffuser decreases the pressure and when the pressure is reduced, the liquid is released in the form of gas. Consequently, extinguishing the fire and cooling down the fuel.

Co2 Extinguisher temperature:

The fire extinguishing agent comes out from the cylinder at -60°C, so it can easily take away the heat element of the fire triangle. In addition to this, it also cuts off the supply of oxygen. In this way it can easily extinguish the fire.more

How to use Co2 Fire Extinguisher ?

To use a CO2 -fire extinguisher, follow these steps:

  1. Pull out the safety pin at the top of the extinguisher.
  2. Aim the nozzle at the base of the fire.
  3. Squeeze the handle to release the CO2 gas.
  4. Sweep the nozzle back and forth across the base of the fire to extinguish it.
  5. Once the fire is out, release the handle to stop the flow of CO2.
  6. If the fire re-ignites, repeat steps 3-5.

It’s important to note that CO2- fire extinguishers are most effective on Class B and C fires, which are fires that involve flammable liquids and gases, and electrical equipment, respectively. They are not recommended for use on Class A fires, which involve combustible materials such as wood and paper.


CO2 fire- extinguisher is used to suppress the Class B and C fires. They have black label. The gas is stored under high pressure in the cylinder. It leaves no leftover and do not harm the equipment.

CO2 fire extinguisher price in Pakistan

The prices of CO2 fire extinguisher are not fixed. The prices of CO2- fire extinguisher differ because they are available in different sizes from different brands. Start from 4000 PKR to 150k PKR


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