What is the history of foaming?
The Royal Navy experimented with agents foamed by means of compressed air in the 1930s (Darley, 1994) and the United States Navy was using compressed air foam systems (CAFS) in the 1940s for flammable liquid fires.
What is a compressed air foam system?
A compressed air foam system is defined as a standard water pumping system that has an entry point where compressed air can be added to a foam solution to generate foam. The air compressor also provides energy, which, gallon for gallon, propels compressed air foam rather than aspirated or standard water nozzles.
What are the components of a foam pump?
Typical components include a water source, a centrifugal pump, foam concentrate tanks, a direct-injection foam proportioning system on the discharge side of the pump, a mixing chamber or device, a rotary air compressor, and control systems to ensure the correct mixes of concentrate, water, and air.
What is a Class A foaming agent?
This pioneering Class A CAFS used dish-washing detergents or a pine soap derivative, which was readily available as waste from local paper manufacturing industries, as a foaming agent mixed as 8 to 9 parts agent to 91 to 92 parts water, flowing up to 30 US gal (110 L) per minute.
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