Aqueous Film Forming Foams (AFFF) is a detergent-based compound, frequently containing sodium alkyl sulphate, and/or perfluoro telomere as surfactants, which have the ability to spread over the surface of hydrocarbon-based liquids. This gives an effective vapour seal and fast knockdown on hydrocarbon fires, even when low application rates are used and only a thin layer of foam is present. Due to the film-forming characteristic, this type of foam can be applied by non-aspirated nozzles.AFFF Foam Systems

These agents require a very low energy input to produce a high quality firefighting foam. Consequently, they can be applied through a wide variety of foam delivery systems. This versatility makes AFFF systems an obvious choice for airports, refineries, manufacturing plants, municipal fire departments, and any other operation involving the transportation, processing, or handling of flammable liquids.

AFFF Foam System Bladder Tanks

Foam concentrate is often stored in a bladder tank system. In AFFF systems a bladder tank containing a nylon reinforced elastomeric bladder is used to store the foam concentrate. System water pressure is used to squeeze the bladder providing firefighting foam concentrate, at the same pressure, to the proportioner. With bladder tank foam systems, no external power is required, and little maintenance is needed.Foam Supply System

Alcohol Resistant firefighting AFFF Foam Systems

Alcohol-resistant foams are based on AFFF chemistry to which a polymer has been added. ARCs are the most versatile of the firefighting foam agents in that they are effective on fires involving polar solvents like methanol as well as hydrocarbon fires such as gasoline.

Mixing Foam Systems with Water

A foam system requires proportioning equipment to mix the foam with water in the required concentration. Automatic pressure balancing valves regulate the foam concentrate pressure to match the water pressure.