how does a carbon dioxide fire extinguisher work

All fire extinguishers work on the basic principle of removing any of the three basic elements needed for combustion—oxygen, heat or fuel. A carbon dioxide fire extinguisher works by eliminating oxygen and replacing it with carbon dioxide. How Does A Carbon Dioxide Fire Extinguisher Work?

In the larger sizes, the hard horn will be located on the end of a long, flexible hose.

A fire needs oxygen to burn.


The carbon dioxide suffocates the fire. Dry Chemical. They are usually ineffective on Class A fires. Foam can also soak into absorbent fuel to prevent re-ignition. Fire triangle.

In order to put fi res out, one or more of the three main components needs to be removed. You could do the same thing with just about any non-oxidizing gas (nitrogen, for example), but carbon dioxide is inexpensive and easy to store. In this science project, baking powder and vinegar are used to simulate the action of a fire extinguisher.
The CO2 Extinguisher contains carbon dioxide in a liquid form, and when the extinguisher used the liquid is released into the air, turning into a gas and offsetting the oxygen that the fire is feeding on.

Carbon dioxide can be used on Class B & C fires. Carbon Dioxide fire extinguishers extinguish fire by taking away the oxygen element of the fire triangle and also be removing the heat with a very cold discharge. Since their creation two centuries ago, fire extinguishers have played an integral part in saving lives being threatened by a perilous fire.

Read Also: Understanding Fire Extinguisher Ratings. Working of a Fire Extinguisher. When the liquid carbon dioxide inside the extinguisher expands into a gas, the carbon dioxide pushes out any oxygen surrounding the fire. (Image Credit: Gustavb/Wkimedia Commons) Basically, … Foam fire extinguishers work in the same way as powder extinguishers, by smothering the fire.

Carbon Dioxide fire extinguisher works by displacing oxygen from the fire triangle. Fire extinguishers work by using carbon dioxide to extinguishing the oxygen. When you release the liquid carbon dioxide from the tank, the expansion of the liquid and the high-speed evaporation of carbon dioxide gas cools the remainder of the liquid down to the freezing point, where it turns directly into a solid. How does a fire extinguisher work?

Carbon Dioxide Fire Extinguishers.

Carbon Dioxide fire extinguisher size ranges from 5 lbs to 100 lbs or larger.

If you can cut off oxygen to the fire, it will stop burning – that’s why covering a burning pan with a fire blanket puts out the flames. Carbon Dioxide. How does a CO2 fire extinguisher work.

If you have ever seen a carbon-dioxide fire extinguisher in action, you have seen this carbon-dioxide snow form in the nozzle. Another way to cut off oxygen is to throw a blanket over the fire.

Fire fighters use this science in their daily work. This chemical reaction produces water, carbon dioxide, other waste gases and a lot of heat. Carbon dioxide extinguishers work because carbon dioxide molecules are heavier than oxygen molecules. CO2 fire extinguishers hold CO2 gas under great pressure, so it is stored as a liquid. It also has a cooling effect, removing some of the heat. This property can also make them dangerous in confined spaces … CO2 Extinguisher Sizes Without oxygen available to fuel the chemical reaction, the fire goes out quickly.

Additionally, the foam forms a skin that helps cools the fire.


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