Foam generators are designed to expand a foam solution into millions of tiny bubbles, increasing its volume by a factor of more than 200:1.

The extinguishing effectiveness of the Foamtech HX generator (FCH*-250) is achieved via a combination of the following:

• Free air movement essential for continued combustion is reduced.
• Transition to steam of the water content of the foam solution dilutes the oxygen concentration, achieving a level below which combustion cannot be supported.
• Reduced surface tension of the foam solution draining from the expanded foam penetrates the Class A materials, extinguishing deep-seated fires.
• Foam solution lowers the temperature below the combustion point or auto-ignition temperature of Class A and B fuels.
• The insulating and heat-reflecting properties of the foam blanket provide a heat shield, preventing fire spread and extinguishing deep-seated fires.