PULSAIR's flat tank (FT) systems mix tanks with flat bottoms; this system also works in tanks that have a shallow slope to the center or one side, and tanks with dished or curved bottoms. We have also utilized the FT systems in tanks having cone bottoms when the mixing requirements are more demanding. Cone bottomed tanks are usually equipped with PULSAIR VTS systems, which incorporate a single accumulator plate.

[Controllers for PULSAIR flat tank systems are the FT-1, FT-2, FT-2D and FT-3.]

PULSAIR manufactures FT systems in several accumulator plate configurations. The standard configuration is seven plates and two injection valves.

The seven plate configuration, one center plate and six equally spaced radial plates, has been used in tanks up to 30 feet in diameter. The thirteen-plate configuration (FT-1-13) is used in tanks with diameters exceeding 30 feet. This system has three injection valves instead of two, and therefore uses about 1.5 times more air than the seven plate system.

In tanks with diameters exceeding 75 feet, we use 29 accumulator plates and seven injection valves. This system is a FT-1-29 system, but because it must provide signals to seven injection valves, we utilize a Programmable Logic Controller (PLC) system rather than the pneumatic controller, which is limited to sequentially actuating only two valves. Sequential pulsing is critical to energy management. The PLC-based controller dubbed the PULSAIR Programmable Controller (PPC) is similar to our Programmable Remote Station Controller (PRSC), which is used for switching multiple, remote pneumatic systems on and off.

PULSAIR has installed an FT-1-13 in a 90 foot diameter waste water treatment tank. The use of just 13 plates may not seem to correlate with the information above, but that is because the number of accumulator plates used in a tank is dependent on both the diameter and the liquid materials to be mixed. When there are heavy additives or other components that tend to sink, more plates are required to ensure effective, homogenous mixing. PULSAIR’s engineering staff has extensive experience covering a wide range of tank sizes and liquid combinations. They put that knowledge and experience to use when designing systems. The result is the most effective number of plates for the job.

See Also: PULSAIR System Model Numbers