Mechanical Foam Fire Extinguishers

Foam has the ability to form an aqueous film which quickly over water-insoluble hydrocarbon fuel surfaces causing rapid fire extinguishment and vapor suppression for class b fires. Also it provides excellent penetrating and wetting qualities when used on class a fires. Hence, foam extinguishers are ideal for fires involving volatile liquids and freely burning materials such as lubricant, oil fires, paper, cloth, wood, etc.