Belimo electric actuator

Actuator for operating throttle valves and such in ventilation, dust extraction and air-conditioning systems for building services and industrial installations. 

Simple direct mounting on the damper spindleby form-fit. The actuator, with its hollow shaft, is placed over the 8 mm square spindle of the throttle valve and secured by two screws. 

Manual override with push-button possible (the gear is disengaged for as long as the button is pressed or remains locked).