Spring Return Damper Actuators


§  Comprehensive torque offering (22 in-lbs to 270 in-lbs) over a vast selection of actuators for a wide range of applications.

§  True mechanical spring return, providing reliable fail-safe.

§  Manual override crank eases installation (all EF, AF and NF series only).

§  Low power consumption provides higher efficiency and smaller transformer sizing.

§  Minimum torque guaranteed over entire specified operating range, no loss in performance due to temperature or supply voltage.

§  MFT is available in all spring return actuators, giving the user the flexibility to customize and 
adapt a single actuator to various controllers and applications.


Belimo actuators are designed for use in a wide variety of HVAC damper applications. With our comprehensive torque range and the ability to direct mount on standard damper shafts or jackshafts, solutions are available for control dampers, air handlers, economizer units, VAV terminal units, fan coil units, fan shutters and unit ventilators.

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