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| Correct use of a dry chemical extinguisher. From a distance of about 2 metres and upwind aim at the base of the fire. |
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| Use a sweeping motion and keep discharging until certain that re ignition won't occur.It is wise to have a backup plan to deal with re ignition if the dry chemical attack fails . |
The powder in the extinguisher is sodium bicarbonate( baking soda) it releases carbon dioxide when heated and the powder starves the fire of oxygen.
The propellant is nitrogen .
Once a dry chemical extinguisher has been used ,even slightly the propellant will bleed off over a few hours and it must be serviced after this . Always check the pressure gauge of any extinguisher you are about to use .
A 9 kg. extinguisher will discharge for between 60 and 90 seconds
These extinguishers make a huge mess in a confined space , consider using a "flame blanket " for small cooking fires . Large commercial kitchen fires should be dealt with by a wet chemical extinguisher .
The brigade also practiced using a variety of foam branches and a simulated MCAwith a trapped occupant
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