Belimo LF24 Actuator

The Belimo LF24 Actuator is a rugged, 24V AC/DC spring-return damper actuator engineered for reliable on/off control in HVAC systems. Delivering 35 in-lb torque, this unit is designed for dampers up to approximately 8.5 square feet, ensuring positive shut-off and fail-safe operation during power loss. As a direct replacement for the MA-7103, the LF24 features a universal power supply and a simplified mounting bracket that reduces installation time in the field. The mechanical spring return provides consistent torque output, making it ideal for control damper actuators in demanding air handling applications. Its brushless DC motor technology eliminates the need for limit switches, protecting the gear train from stall conditions and extending the service life of the damper motor. Designed for HVAC zone control, the LF24 maintains a compact footprint while offering high reliability for both new construction and retrofit projects where performance and damper actuator compatibility are non-negotiable.

Key Benefits for Contractors

• Fail-Safe Reliability: Mechanical spring return ensures the damper returns to the safe position during power interruptions.
• Direct Replacement: Seamlessly replaces the MA-7103 and similar legacy 35 in-lb actuators.
• Maintenance-Free Design: Brushless DC motor prevents burnouts and eliminates the need for internal switch adjustments.
• Versatile Mounting: Includes a universal clamp for easy attachment to various shaft sizes and shapes.
• Energy Efficient: Low power consumption during both operation and holding modes optimizes system efficiency.

Common Questions

Can the Belimo LF24 be used in outdoor applications?
This actuator features a standard NEMA 2 enclosure; for outdoor use, it requires a protective weather shield to prevent moisture ingress.

What is the typical stroke time for this actuator?
The LF24 typically operates the motor in 40 to 95 seconds, with a spring return timing of less than 25 seconds at room temperature.

Does this unit come with auxiliary switches?
The standard LF24 model is an on/off actuator without internal switches; if feedback is required, verify the specific sub-model suffix (such as -S) before installation.

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.