Caleffi’s FlowCal is an automatic flow-balancing valve that provides high system performance and efficiency. It automatically maintains the flow rate to each terminal unit regardless of differential pressure changes across the circuits. The FlowCal eliminates the need for onsite measurements and trial-and-error flow settings required by most manual calibration valves. The FlowCal has union-end connections for ease of installation and maintenance with 16 flow rates available from 0.5 to 10 gpm. Connection sizes are 1/2”, 3/4”, 1” NPT, sweat connections and 3/4” press connections.