Fire fighting nozzle and method including pressure regulation, chemical and education features

The invention relates to fire fighting and fire preventing nozzles and more particularly to nozzles for extinguishing or preventing large industrial grade fires including flammable liquid fires and/or for nozzles for vapor suppression, and includes improvements in pressure regulating, educting and chemical discharge features, as well as methods of use. A fire fighting nozzle for extinguishing industrial scale fires including improved automatic pressure regulating features, enhanced educting features having central () and peripheral channeling () for foam concentrate, combined with a capacity to throw dry chemicals. The improved pressure regulating features include a spring () loaded double acting baffle (), that is positioned by fire fighting fluid in communication with a hydraulic chamber, the hydraulic chamber is preferably controlled by a relief valve ().