Foam is produced by mixing a foam concentrate with water at the appropriate concentration, and then aerating and agitating the solution to form the bubble structure. Some foams are thick and viscous and form tough and, heat-resistant blankets over burning liquid surfaces and vertical areas. Other foams are thinner and spread more rapidly. Some foams are capable of producing a vaporsealing film of surface-active water solution on a liquid surface. Some, such as medium- or high-expansion foam, are meant to be used as large volumes of wet gas cells for inundating surfaces and filling cavities.
The process of producing and applying fire-fighting air-foams to hazards requires three separate operations, each of which consumes energy.
a. The proportioning process
b. The foam generation phase
c. The distribution method.
Foam agent can be discharged through various arrangement of Systems such as Foam-water Sprinkler Systems, Foam-water Deluge Spray Systems, Foam pouring System, Foam monitor Systems etc.