... ,clean-air,halon,Co2 Foam-agent Fire-extinguishing system Foam-agent fire extinguishing system consists of pressured water source, foam ... system is widely used in petrochemical industry, tanks zone, oilfield, offshore oil plateform in case of fire caused by flammable liquid or gas ... proportioner is an important part of foam agent fire extinguishing system. Electromotor, hydraoturbine or other source of ...