The JRG 6320 valves are used in loop design applications where there is a number of "sub-loops" that require balancing in order to ensure even temperature throughout.

The 6320 thermo-regulating valve are normally positioned at the end of each sub-loop and will allow water to circulate through that sub-loop until the desired temperature is reached. At that point it will slowly close allowing hot water to pass to other sub-loops, thus maintaining a balance across the whole system.