This is the lead free model
The Circuit Setter Model RF calibrated balance valve is designed specifically for pre-set or proportional system balance for use with terminal and fan coil units. This system balance method, developed by B&G, assures optimum system flow balance at minimum pump operating horsepower. Terminal unit balance valves can be simply pre-set using the B&G Circuit Setter Model RF Curves and the system piping plan. With this procedure, system balance and start-up time is reduced dramatically.