FIELD: actuating systems for replacing and tracing motion of locking and regulating fittings of conduits for gas and oil products. SUBSTANCE: apparatus includes electropneumatic control unit; fluid motor; reduction gear; rotary mechanism; output shaft; device for displaying data related to position of output shaft, said device having reed limit switches; limiter of maximum value of transferred angular momentum. Said limiter is in the form of mechanism for reciprocation motion of steel shutter placed between fixed reed switches and fixed permanent magnets. EFFECT: enhanced operational reliability of actuating apparatus. 5 dwg
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