The Bladder-Tank System works without requirement for any external energy supply. The foam concentrate is stored in a rubber bag (bladder),which is contained inside the tank, is displaced from it by means of water under pressure picked from the main Water line, and injected into the main water line through the pressure drop generated by a venturi orifice

The Vertical and Horizontal Bladder tanks are designed and constructed in accordance with the latest revisions of I.S.P.E.S.L.or ASME code Section VIII for unfired pressure vessels. They have a working pressure of 12 bar (175 PSI) and they are tested to 17,2 bar (249,5 PSI). Used with a ratio controller, this system is designed to inject foam concentrate into a suitable water supply and to automatically proportion foam concentrate over a wide range of flows and pressure