Fire fighting equipment foam bladder tank employs water to pressurize the bladder and force foam concentrate to the ratio controller. The water supply simultaneously feeds the ratio controller and the bladder tank. As water flows through the ratio controller the level of pressure reduction increases, thereby affecting a corresponding pressure drop across the foam concentrate metering orifice. The correspongding pressure drop results in foam concentrate flow that is proportionate to the water flow through the ratio controller. As both the water and foam concentrate flow into a common reduced pressure area, it is necessary only to maintain identical water and foam concentrate pressure at the respective inlets of the ratio controller.

There are horizontal type and vertical type for options, and its ratio can be 1%, 3% and 6% for options. And we can also make foam bladder tanks with double ratio controllers if the flow required is higher than 80L/S.

Our company has more models for options, please visit www.pyfire.com if you want to know more about vertical foam bladder tank proportioning system.