Spring-return actuators are used in ventilating and air conditioning plants to operate air dampers and air throttles:
For damper areas up to 1.5 m2, friction-dependent.
In ventilation sections where the actuator must move to the zero position (emergency position) during power failure.
For connection to two-position, three-position, or modulating controllers.
For dampers having two actuators on the same damper shaft (tandem-mounted actuators or Powerpack).