FIELD: blow-off regulating valves for gas pressure stations. SUBSTANCE: drive has control system, pneumatic jet motor connected with output member through mechanical transmission at reciprocating motion; mechanical transmission has torque limiting clutch, manual standby and non-self-braking pair-motion screw-nut; motion screw is axially movable and is connected with output member of drive and with compression springs; ratchet wheel is coaxially connected with nut; ratchet wheel is engageable with pneumomechanical controllable retainer. EFFECT: enhanced reliability. 3 dwg
