Jun 292013

How fire extinguisher works?How fire extinguisher works

A fire­ extinguisher is an unconditional requirement in any home or office. Even as there's a good chance that the extinguisher will sit on the wall for years, collecting dust, it could end up saving your assets and even your life..

In this article, we'll understand precisely how fire extinguisher works, Method of using Fire extinguishers and Types Of Fire Extinguishers and there use what fire extinguishers do and how they do it. Fire extinguishers apply an extinguishing mediator that will cool burning fuel, displace or remove oxygen, or stop the chemical reaction hence a fire cannot continue to burn. Once the handle of an extinguisher is compressed, mediator is expelled out the nozzle. A fire extinguisher works much similar a can of hair spray..


To be aware of how fire extinguishers works, you need to recognize a little about fire. Fire is a very rapid chemical reaction between oxygen and a flammable material, which results in the release of heat, light, flames, and smoke.

For fire to be present, the following four components must be present at the same time :

  • Enough oxygen to sustain ignition,
  • Enough heat to raise the material to its ignition temperature,
  • Some sort of fuel or combustible material, and
  • The chemical reaction that is fire

The letters (A, B, and C) symbolize the type(s) of fire for which the extinguisher has been permitted. Although extinguishers can vary in size, color and type of extinguishing agent. All extinguishers work basically the same way.

For small fire and there has no heavy smoke and you have an exit accessible to you for evacuation purposes, grab the nearest suitable extinguisher and operate following the P-A-S-S method.

Method of using Fire extinguishers –

P – Pull the pin located in the extinguisher's handle.

A – Intention the nozzle at the base of the fire.

S – Squeeze the handle.

S – Sweep from side to side at the base of the fire until the fire is out.

It's easygoing to recall how to use a fire extinguisher if you can memorize the short form PASS, which stands for Pull, Aim, Squeeze, and Sweep.

Types Of Fire Extinguishers and there use:


Ordinary Combustibles Fires in paper, cloth, wood, rubber, and many plastics require a water type extinguisher labeled A.


Flammable Liquids Fires in oils, gasoline, some paints, lacquers, grease, solvents, and other flammable liquids require an extinguisher labeled B.

Dry Chemical

Electrical Equipment Fires in wiring, fuse boxes, energized electrical equipment, computers, and other electrical sources require an extinguisher labeled C.


Ordinary Combustibles, Flammable Liquids, or Electrical Equipment Multi-purpose dry chemical is suitable for use on class A, B, and C.

Related reading : Fire-Extinguisher

 Posted by at 9:35 am

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