A self-compensating piezoelectric actuator for a control valve

摘要: An actuator device for a control valve is described and comprises piezoelectric actuating member (12) bringing about the movement of closure (30) between an open position position; has reference portion (20) connection to fixed (26) free (24) (30), being movable relative as result mechanical deformations produced in by effect. The controllable selectively condition which it (26), locked firmly magnetic attraction.