How do wet chemical fire extinguishers work

Wet chemical fire extinguisher colour. Turn off the source of heat if safe to do so. Hold the lance at arm’s length, well above the fire with its nozzle at least 1 Metre away from the fire. Holding the lance still, discharge so that the spraying wet chemical falls gently onto the surface of the …

The wet chemicals mainly work by cooling and emulsifying when it’s applied to burning oils and fats. When this happens, the surface is sealed, and the fire is prevented from reigniting. Extinguishers using wet chemicals are also rated in the A and F classes of fire rating.

Wet chemical fire extinguisher: How it works, colour

How wet chemical extinguishers work: The ‘chemical’ element of wet chemical fire extinguishers is potassium. Potassium salts are sprayed out as a fine mist (gently, so as not to spread the burning oil or fat), and these react to create a soapy film on the surface of the substance on fire.

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How does a wet chemical extinguisher work?

Instead of covering the burning oil and aggravating it to pop or smoke, the wet chemical extinguisher discharges a layer of a soap like substance. This is designed to form a barrier that prevents the fire from spreading and cool the oil.

How do wet chemicals extinguish a Class F fire?

In extinguishing Class F fires, wet chemicals work by covering the flammable liquid using a blanket of foam. This foam blanket then forms a crust on top of the fat or cooking oil. As a result, the oxygen supply to the other elements of combustion is cut off. This hinders the process of combustion from continuing.

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How do wet chemicals work to stop fires?

The wet chemicals mainly work by cooling and emulsifying when it’s applied to burning oils and fats. When this happens, the surface is sealed, and the fire is prevented from reigniting.

Do I need a wet chemical fire extinguisher?

Wet chemical fire extinguishers need to be used very carefully, to avoid splashing burning fat or oil onto surrounding areas. If you think you need wet chemical fire extinguishers, or if you are not sure what you need, just get in touch with our friendly team by calling 0800 157 1113, or emailing info@surreyfire.co.uk.

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