... ,FM200,clean-air,halon,Co2 Foam-agent Fire-extinguishing system Foam-agent fire extinguishing system consists of pressured water source, foam ... mixed proportioner is an important part of foam agent fire extinguishing system. Electromotor, hydraoturbine or other source of ... abundant foam-mixed liquid for fire extinguishment. Therefore, it is widely used in large fire extinguishing projects, such as, ...