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Foam
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. |  |
range
of foam and water extinguishers is certified to BS
EN 3 : 1996 and manufactured under
an ISO
9001 approved quality system.
The cylinders are deep drawn from cold rolled steel, centre
welded and pressure tested to twice the extinguisher 's
working pressure. Cylinders are externally coated with epoxy
polyster (with phosphate under treatment) for maximum corrosion
resistance and have passed the 480-hour salt spray test. The
internal of the extinguisher bodies are coated with "performance
polymer alloy" to prevent corrosion. The hot forged brass
valve is fitted with a pressure indicator and can be tested "in
service"
as required by BS EN 3 : 1996. These extinguishers
have also passed the 35KV electrical conductivity
test BS EN 3-2 : 1996 Clause 4 Annex A.
