Rosenbauer ­ POLY extinguishing systems
Powerful CAFS firefighting equipment.
Efficient. Universal. Safe.
Production of CAF foam
Mode of action of CAFS foam
CAFS stands for Compressed Air Foam System and is
During active foam expansion, a single water drop is
a system for the production of high-quality CAF (Com-
distributed across multiple foam bubbles, which results in
pressed Air Foam), which is used to fight solid and liquid
a larger surface area for heat absorption. Furthermore, the
fires.
CAF foam sticks to the flammable material thanks to its
homogeneous structure and thus enables continuous heat
In the production of CAF, the same three components
absorption. As a result, a large part of the water bound
are required (water, foam compound and air) as in the
in the CAF is able to evaporate, thus providing maximum
generation of conventional fire fighting foam. The crucial
cooling at the seat of the fire.
difference lies in the foam expansion of the water-foam
compound mixture, which in the CAFS system does not
The oxygen is displaced from the flammable material
take place passively through the injector principle on
through evaporation of the water. Additionally, a natural
the nozzle, but rather actively in a mixing chamber in the
separating layer is created between the flammable material
system by means of compressed air.
and the oxygen as a result of the CAF. Thus the oxygen
supply to the seat of the fire is interrupted in the best
Due to this active foam expansion, the resulting CAF foam
possible way.
has a more homogeneous foam structure as well as a
much higher energy content in comparison with conven-
Due to the high kinetic energy of the CAF foam and the
tional fire fighting foam.
reduction of surface tension through the added foam
compound, water can penetrate deeper into the flammable
material and thus soak in better.
Suffocation by displacement of
oxygen
Cooling by evaporation of fire
fighting water
Suffocation by separating the
reaction partners
Reduction through penetration
of burning material

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