Balancing is essential to saving the energy used in hydronic systems. The R206B static balancing valves allow a gradual and precise regulation of the flow rate. The R206B valves have a flowmeter with calibrated orifice (Venturi principle), that is with fixed Kv. Through the pressure outlets (depending on the versions they are provided with or they are optional accessory) and a differential manometer, it allows to carefully measure the flow rate actually circulating.