Calibration and balancing valve with flanged connections and self-sealing measuring sockets for heating, cooling and sanitary systems. Flanged body in cast iron. Equipped with a calibration display and antitampering setting lock. When the value of the valve is set, it can be opened or closed, but not at a higher kv value than the one set. PN16, max. working temperature 120°C, EPDM gaskets.