Our PHZY(M) series stock tank pressure type air and foam proportional mixing device is composed of a foaming tank, pressure type proportional mixer, inlet pipe, outlet pipe and control valve. When the pressure flow goes through the proportional mixer of this device, the water and foam can be automatically mixed according to a certain proportion and the foam mixture will then be sent to the foam generator and spray equipment to produce spray air foam for fire extinguisher. This device is available in two types; vertical and horizontal .The membranous device features a rubber made capsule in the storage tank and the foam liquid, making it is especially suitable for aqueous film foam liquids. Additionally, the residue foam liquid is good for future use after fire extinguishing. This device enjoys the advantages of high safety, reliability and efficient fire extinguishing performance. It is suitable use in petroleum enterprises, petrol stations and airports. producing area:China payment:L/C, T/T