Fire extinguisher and its Types

Fire extinguisher:

 A fire extinguisher cut off the supply of Air or bring down the temperature of the fuel or both and controls the fire.

How do fire extinguishers work?

Portable fire extinguishers apply an extinguishing agent that will either cool burning The most common types of fire  fuel, displace or remove oxygen, or stop the extinguishers are,  chemical reaction so fire cannot continue to  Air pressurized water extinguishers,  burn. When the candle of an extinguisher is compressed, it opens and inner canister of high Carbon-di-oxide extinguishers. pressure gases forces the extinguishing agent Dry chemical powder extinguishers. from the main cylinder through a siphon tube and out the nozzle. A fire extinguisher works much like a can of hair spray.

Types of fire extinguisher:

The most common types of fire extinguishers are,

* Air pressurized water extinguishers,

* Carbon-di-oxide extinguishers.

* Dry chemical powder extinguishers.

The different types of extinguisher tackle different types of fire

Fire extinguishers can be broadly classified into five types:

1. Water, 2.Foam, 3.Dry Powder, 4.CO₂, 5.Wet Chemical.

The classes of fire

There are five classes of fire: Class A, Class B, Class C, Class D, and Class E.

Class A fires – Combustible materials: caused by flammable solids, such as wood, paper,

and fabric

Class B fires  – Flammable liquids: such as petrol, turpentine or paint

Class C fires  – Flammable gases: like hydrogen, butane or methane

Class D fires  – Combustible metals: chemicals such as magnesium, aluminum or potassium

Class E fires  – Typically a chip-pan fire

Electrical fires  – Electrical equipment: once the electrical item is removed, the fire changes class