Foam extinguisher, with aqueous flim forming addictive
(AFFF), offers improved fire extinguishing abilities over water
based extinguisher . The foams forms an aqueous flim which helps
to prevent the release of fuel vapours while the foam blanket
(from which the flim forming liquid drains) excludes oxygen from
the fuel surface, extinguishing the fire and preventing re-ignition.
The water content of the foam provides a cooling effect. The
flim forming liquid, although heavier, floats on the surface
of the fuel, due to it's surface tension.
Effective on B class hydrocarbon fuel fires
such as oil , petroleum, aviation fuel, and is paticularly
suitable where fast fire knockdown is essential. It is compatible
with all dry powders. It's excellent wetting characteristics
make it useful in combating Class A fire as well.