Do you know what aqueous film-forming foam fire extinguishing agent is and its functions? Most people may lack relevant understanding. This article introduces its relevant knowledge to help you with selection and application.

Widely adopted in various industries, this high-performance foam agent is still unfamiliar to many users. It can be mixed with fresh water at a volume ratio of 3:97 and matches most proportioning mixers and foam spraying devices. During fire suppression, water separated from the foam layer forms a protective film on fuel surfaces to isolate air, accounting for its great popularity. It features excellent flexibility and rapid fire extinguishing capacity.

This agent delivers long-lasting sealing performance and strong resistance against flashback. Containing fluorocarbon surfactants, it reduces the surface tension of foam solution and enables the solution to float on fuel surfaces. The film-forming effect varies with fuel surface tension, performing better on fuels with higher surface tension such as diesel and aviation gasoline than low-tension fuels like n-hexane and regular gasoline.

It is applicable to high-temperature oil fires and sub-liquid spray fires. It can put out fires of water-insoluble substances including petroleum and petroleum products, and works effectively against water-soluble flammable liquids such as alcohols, esters, ethers, aldehydes, ketones and amines. Boasting fast fire suppression speed and outstanding fire resistance, it has obtained IA fire rating certified by the National Quality Inspection Center for Fixed Fire Extinguishing Systems and Fire-resistant Components.

It requires low stirring energy and features favorable maneuverability to swiftly extinguish oil fires. It is compatible with standard foam proportioning equipment and matched dry powder extinguishing agents.

Now it is extensively applied in foam and water spray fire systems, as well as aircraft hangars, oil loading zones and processing areas. It is especially suitable for airport fire fighting, rescue operations and non-polar solvent fires, and can also serve as a wetting agent for Class A fire suppression.