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Hand-held foam extinguishers used the same two chemicals in solution. To actuate the extinguisher, a seal was broken and the unit inverted, allowing the liquids to mix and react. Chemical foam is a stable solution of small bubbles containing carbon dioxide with lower density than oil or water, and exhibits persistence for covering flat surfaces ...
APW extinguishers are commonly converted into makeshift CAFS extinguishers by drilling two 1.6–3.2 mm (1 ⁄ 16 – 1 ⁄ 8 in) holes in the pickup tube. The unit is then filled with 5.7 litres (1.5 US gal) of water and Class A foam, aqueous film forming foam (AFFF), film-forming fluoroprotein (FFFP) or commercial detergent is added to the water in a 1% ratio for class A fires and a 3–6% ...
Aqueous film-forming foam ... 1970s Light Water AFFF foam fire extinguisher. Amerex Solid-Charge AFFF Fire Extinguisher, 1980s (obsolete) A 2.5 US gal ...
A fire extinguisher can be the difference between a minor house fire and the total loss of your home. However, a fire extinguisher is only as effective as its accessibility when disaster strikes ...
Also, the opaque surfaces of the foam, as it adheres to walls and ceilings, shield the fuel source from radiant energy. (Brooks, 2005; Brooks, 2006) - Later disproven in NIST Study, see below. CAFS may also refer to any pressurized water style extinguisher that is charged with foam and pressurized with compressed air.
2,2-Dichloro-1,1,1-trifluoroethane or HCFC-123 is considered as an alternative to CFC-11 in low pressure refrigeration and HVAC systems, and should not be used in foam blowing processes or solvent applications. It is also the primary component of the Halotron I fire-extinguishing mixture.
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