OPERATING PROCEDURE FOR SODA ACID FIRE EXTINGUIGHER

1.0 OBJECTIVE

2.0 SCOPE

3.0 RESPONSIBILITY

4.0 PROCEDURE

To operate the extinguisher , remove the guard cap and strike the plunged against a hard surface like the floor keep the cylinder inverted.

Direct the jet emerging from the nozzle on the base of fire. When the plunger is struck , it breaks the acid phial (bottle ) .

The sulphuric acid and sodium bicarbonate solution react together to release carbon dioxide (CO₂ )

The CO₂ generated creates pressure which forces the water out of the extinguisher .

Note : the CO2 acts only as a propellant and water extinguishes the fire cooling effect.