What is the ideal finished foam quality for firefighting?
August 3, 2022
Finished-foam quality — a measure of durability or usefulness of a foam blanket — is measured two ways; expansion ratio and 25% drain time. Finished-foam quality is a function of the volume of air drawn into the nozzle and the amount of mechanical agitation that occurs in the nozzle or nozzle-foam tube. Expansion ratio is […]