Use for a lower pressure setting in some circuits than in the main circuit. JGB valve maintains a constant pressure at the secondary side even when the pressure in the primary side main circuit changes. The branch circuit pressure can be controlled remotely by connecting a relief valve for remote control to the vent port.
These balancing valves integrate a reducing valve, relief valve, and check valve into one unit. The limited pressure change in response to the change in the load flow rate improves the control accuracy. The external drain configuration eliminates the influence of the back pressure in the return line.