FIELD: control of amount of opening of valve. SUBSTANCE: proposed control head has holder for securing it on valve body, thermosensitive element, electric heating element and heating control circuit in accordance with control voltage defining amount of valve opening. Thermosensitive element with expanding agent, type wax cartridge is fitted on holder and is provided with actuating element for motion of valve rod which is found at outlet end. Electric heating element is located near element containing expanding agent. Control circuit has unit 11 for measuring the position which furnishes the signal of position corresponding to position of actuating element 5 or position of part shifted by it. Control circuit 20 regulates heating depending on control signal and position signal. EFFECT: enhanced reliability of valve control. 7 cl, 6 dwg
