FIELD: control units for safety valves. SUBSTANCE: proposed device includes control device for control of high-pressure tank valve through pressure-to-motion transducer. Space of pressure-to-motion transducer is connected with discharge tank through drainage line. According to first version, change- over valve device is provided for drainage line; this device operates when pressure in discharge tank exceeds limiting level connecting space of discharge tank with discharge line. According to second version, device is provided with hydraulic system-compensator for compensating first force which counter-acts second force. EFFECT: enhanced reliability. 13 cl, 5 dwg
