Bladder Tanks are a component of a balanced pressure proportioning system that includes a pressure-rated tank with an internal elastomeric bladder for foam concentrate storage. Upon system actuation, incoming water applies pressure to the concentrate in the bladder, which supplies pressurized concentrate to the proportioning device. The device meters the foam concentrate into the fire water line, creating foam solution. The solution is then piped to the discharge devices protecting the hazard area.
Bladder tanks have numerous applications, including truck loading racks, aircraft hangers, dip tanks, pump rooms and helipads. Because the tanks require no external power supply other than a pressurized water source, they are more economical compared to pump systems (for systems under 2,000 gallons). And bladder tanks, because of their simple design, require very little maintenance.
Bladder tanks are available in horizontal, vertical and pre-piped models.