How does a foam extinguishing system work?

In a huge tank-like mixing unit, the foam liquid is mixed with water in a certain proportion. This ratio is different in different types of devices, usually around 3%~3.9%.

In the equipment, the type of foam liquid is generally protein foam liquid, fluorine protein foam liquid, and soluble fluorine protein foam fire extinguishing agent. The use temperature is generally controlled at 0 °C ~ 55 °C.