flow controls are ideal for achieving optimal operation in variable speed pumping systems by compensating for hydronic pressure differences. Whether the media is liquid or gas flow rate controllers have been applied successfully worldwide for a myriad of applications regardless of pressure fluctuations. These systems consisting of a ball-type shutoff valve, commissioning measuring ports and a flow control cartridge maintains the flow rate at a constant level. The automatic flow control valves ensure flow rate is maintained at a constant pressure, even under fluctuating pressure conditions maintaining desired flow rates. The flow control valve also facilitates easy flushing of the piping upon commissioning of the system. Benefits of the control system valve include reduction of time needed for adjustment of the system, an open channel flow control area, and elimination of pipe length requirements before and after the valve.