Jump to Water types - General gal. pump-type water fire extinguisher, s, US (including deep-seated fires), but can be safely used only in the. Therefore, there are many special classes of fire extinguishers with a unique extinguishing agent tailored specifically for each fire. This allows fires to be. Fire extinguishers are designed to tackle specific types of fire. There are six different classes of fire and several different types of fire extinguishers.


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Foam agents also separate the oxygen element from the other elements. The discharge stream could spread the flammable liquid in a Class B fire or could create a shock hazard on a Class C fire.

Fire extinguisher types - we explain the different types of fire extinguisher

Carbon Dioxide 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. They are usually ineffective on Class A fires.

The height limit rule of 48 inches is primarily related to access by people with wheelchairs but it is also related to other disabilities as well. Installations made prior to at the inch height are not required to be changed.

In New Zealand, the mandatory installation of fire extinguishers in vehicles is limited to self-propelled plant in types of fire extinguisher and arboriculturepassenger service vehicles with more than 12 seats and vehicles that carry flammable types of fire extinguisher [15].

NZ Transport Agency recommends [16] that all company vehicles carry a fire extinguisher, including passenger cars. Types of extinguishing agents[ edit ] A small, disposable sodium bicarbonate dry chemical unit intended for home kitchen use.

Two Super-K potassium chloride extinguishers. Met-L-Kyl cartridge-operated fire extinguisher for pyrophoric liquid fires.

Types of Fire Extinguishers – The Fire Equipment Manufacturers’ Association

This is a powder-based agent that extinguishes by separating the four parts of the fire tetrahedron. It prevents the chemical reactions involving heat, fuel, and oxygen combustionthus extinguishing the fire.

During combustion, the fuel breaks down into free radicalswhich are highly reactive fragments of molecules that react types of fire extinguisher oxygen. Types of fire extinguisher substances in dry chemical extinguishers can stop this process. More corrosive than other dry chemical agents.

Pale yellow in color. Sodium bicarbonateregular or ordinary used on class B and C fires, was the first of the dry chemical agents types of fire extinguisher.

In the heat of a fire, it releases a cloud of carbon dioxide that smothers the fire. That is, the gas drives oxygen away from the fire, thus stopping the chemical reaction.

This agent is not generally effective on class A fires because the agent is expended and the cloud of gas dissipates types of fire extinguisher, and if the fuel is still sufficiently hot, the fire starts up again.

While liquid and gas fires do not usually store much heat in their fuel source, solid fires do. Sodium bicarbonate was very common in commercial kitchens before the advent of wet chemical agents, but now is falling out of favor as it is much less effective than wet chemical agents for class K fires, less effective than Purple-K for types of fire extinguisher B fires, and is ineffective on class A fires.

Apart from the type of fires they dissolve, fire extinguishers are also numerically rated for the size of the fire they can control.

Fire extinguishers

Standard ratings serve as quick identifiers for the scale of fire which can be handled. Therefore, a 2-A rating extinguisher is equivalent to 2. Therefore, larger numbers indicate a capacity to handle larger fires.

Other details about the extinguisher such as class category, are mentioned on fire extinguisher labels—without which, determining the right fire extinguisher would be impossible. Read our fire extinguisher safety tips to learn how to stay safe and don't forget to make sure you have the right coverage if your home sustains fire damage.

Getting started with fire extinguishers The first thing to do when choosing a fire extinguisher is to decide which rooms in your house need one. You should keep at least one on each level of your house.

The water loses its natural surface tension meaning that it types of fire extinguisher soak into the burning materials more effectively. Adding the chemicals to the water means types of fire extinguisher a smaller extinguisher can produce the same fire rating as a larger, water only, extinguisher.

Water mist, or fog, extinguishers apply water in the form of mist, or fog, the droplets are much smaller than those from the water spray extinguisher.


The smaller the droplet, the larger its surface area in relation to its size, the quicker the droplet evaporates which absorbs the heat energy faster.