What is a Foam Extinguisher?

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Fire Extinguisher is a portable fire fighting equipment which can be moved manually to the fire. It contains fire extinguishing material and is specially designed for the purpose of tackling with fire in its initial stage.

A Foam extinguisher is also called as a Mechanical Foam Extinguisher

Courtesy - 123rf

There are two types of Foam extinguisher according to their operational method:

01. Foam (gas cartridge) type extinguisher

02. Foam (Stored Pressure) extinguisher

Also Read: Different Types of Fire Extinguisher

01. Foam  (gas cartridge) type extinguisher

In this type of extinguisher pre-mixed foam solution (Aqueous Film-Forming Foam)is used as an extinguishing material. Pressurised CO2 gas cartridge is used to release the pressure which is stored inside the body of the extinguisher. A knob is provided at the top of extinguisher for puncturing the cartridge. On puncturing the cartridge, gas is released from it, this will force the water to come out from the body of the extinguisher. Forced pre-mixed foam solution comes out through the nozzle of the extinguisher in the form of a small jet, which can be projected on to the fire.

Foam Type of Extinguisher carries 9 litres of water when it is filled to the specified level. A gas cartridge is fixed on a holder and holder is fitted on the cap of extinguisher. The maximum amount of the gas cartridge is 60 g for a 9 litre extinguisher.

02. Foam (Stored Pressure) extinguisher:

In this type of extinguisher pre-mixed foam solution (Aqueous Film-Forming Foam) is used as a extinguish material. Dry air pressurisedup to 10 bars is used to release the pressure which is stored inside the body of the extinguisher. The air can be supplied by compressed aircylinders or by certain type of pump.

Safety pin, lever arm and hose are provided at the top of extinguisher. By removing safety pin, depressing the valve lever arm, the hose is used to direct the foam jet.

It also carries 9 litres of water when it is filled to the specified level.

Also Read: What is a Water Type of Extinguisher?

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