This CAF Flow guide is real world data to provide information on the air and foam solution flows with various size hose lines, smooth bore nozzle tips, and foam types. It is meant to be used in training and testing to help achieve the proper finished foam product. The numbers were not calculated by a formula but rather actual air and solution flows measured with a properly calibrated foam proportioner and air flow meter flowing the various hose and nozzle configurations listed. Don’t get too tied up in the numbers, they are guidelines. CAFS will work over range of flows and you can decide what works best for your F.D.
