Foam fixed extingiushig system used air foam for extinguishing, which is produced by aeration of the foaming solution made of water and foamer, when quantity of admixed air determines the type of foam of heavy, medium and light foam.

Foam extinguishing system is used for the protection of flammable liquids stored in aboveground storage tanks, in storages of dangerous substances, technological equipment with flammable liquids, cable areas, aircraft hangars, refineries, in the chemical industry, etc. Foam cover prevents the access of oxygen, thereby extinguishes resulting fire and subsequently prevents re-ignition of the flammable liquid.