... -air,halon,Co2 Foam-agent Fire-extinguishing system Foam-agent fire extinguishing system consists of pressured water source, foam-stored ... will extinguish fire by cutting off air. This system is widely used in petrochemical industry, tanks zone, oilfield, offshore oil ... proportioner is an important part of foam agent fire extinguishing system. Electromotor, hydraoturbine or other source of power is ...