Belimo Spring Return Actuators

Extensive torque offering (18 in-lb to 180 in-lb), a vast selection of actuators for a wide range of applications.

True mechanical spring return, providing the most reliable fail-safe.

Manual override crank facilitates installation (all AF and new generation 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.

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 or 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.

Model	Torque	Approximate Damper Area
Belimo TF Series	18 in-lb	4.5 square feet
Belimo LF Series	35 in-lb	8 square feet
Belimo NF Series	60 in-lb	22 square feet
Belimo AF Series	133 in-lb	33 square feet
Belimo AFB and AFX Series	180 in-lb	45 square feet
Belimo EF Series	270 in-lb	66 square feet