They work through a process called saponification, where the chemical agent reacts with the burning oil or fat to form a soapy, foam-like substance that seals the surface and prevents re-ignition.
The low-pressure discharge minimizes the risk of splashing hot oils and fats, reducing burn injuries and fire spread.
Available sizes typically include 2lt, 3lt, 6lt, and 9lt options.
These extinguishers should not be used in isolation and premises require other types of extinguishers to deal with all potential fire emergencies.