How it works
The Reg-U-Flo Vortex Valve optimizes flow control by allowing higher discharge rates at lower heads than conventional flow control options. The head/discharge curves shown below illustrate the potential storage volume savings offered by a Reg-U-Flo compared to an orifice.

The Reg-U-Flo operates on simple fluid hydraulics. Flow enters the volute tangentially through the intake. Under low flow conditions, the Reg-U-Flo acts as a large orifice where water and debris pass directly from the inlet to the outlet as shown in Figure A.

As flow increases and reaches the flush fl ow point, high
peripheral velocities start to throttle. As head increases, the valve approaches the kickback and an air-fi lled core starts to form in the volute. As head continues to increase, the air core fully stabilizes and the valve discharge is throttled to that of a smaller orifice (see Figure B).

Reg-U-Flo Vortex Valves are typically designed for flows ranging from 0.07 cfs to 100 cfs, although Reg-U-Flo Vortex Valves have been designed for large dams with flows in excess of 400 cfs.