Belimo LF24-MFT-20 Actuator

The Belimo LF24-MFT-20 is a versatile spring return actuator designed for the fail-safe operation of dampers and valves in HVAC systems. Operating on a 24V AC/DC supply, this Multi-Function Technology (MFT) actuator provides a torque output of 35 in-lb (4 Nm), ensuring reliable performance in small to medium-sized air handling units. The MFT electronics allow for field-customizable control signals, supporting various inputs including 2-10 VDC, 4-20 mA, and specifically tuned ranges like 6-9 VDC. This unit is technically identical to the LF24-MFT-2.0, facilitating seamless inventory replacement and HVAC automation integration. Built with a brushless DC motor and electronic stall protection, it eliminates the need for limit switches. The rugged NEMA 2 housing and high fail-safe torque capacity make it a standard choice for contractors requiring precision moduating control and proportional feedback in demanding mechanical environments.

Key Benefits

• Programmed Versatility: Features Multi-Function Technology for field-adjustable parameters including running time and control signal.
• High Reliability: Direct coupled spring return mechanism ensures immediate fail-safe positioning during power loss.
• Universal Compatibility: Operates on 24V power and accepts a wide range of DC control signals for diverse system architectures.
• Simplified Installation: Standardized mounting footprint speeds up field replacement for old LF series actuators.

Common Questions

What is the difference between the LF24-MFT-20 and the LF24-MFT-2.0?
Technically, they are identical units. The "2.0" or "20" nomenclature denotes the software version or specific factory scaling, but they share the same physical specs and 5-foot cable leads.

Can I use this for both clockwise and counter-clockwise fail-safe?
Yes, the direction of the spring return is determined by the orientation of the actuator on the damper shaft (mounting side A or B).

Does this actuator require an external 20VDC supply?
The internal circuitry can utilize a 20VDC supply for signal conditioning, but the primary power requirement is a standard 24V AC/DC source.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.