Belimo LRB24-MFT Non-Spring Return Actuator, 45 in-lb, Multi-Function

Description

The Belimo LRB24-MFT is a versatile, non-spring return rotary actuator engineered for demanding HVAC damper and valve control applications. Featuring a robust 45 in-lb torque output and multi-function (MFT) technology, this actuator supports a wide range of control signal types in a single unit — making it an ideal choice for building automation systems that require flexibility and reliability.

Control Signal Compatibility

• 500 Ohm feedback/control for 4–20 mA analog signals
• 1500 Ohm feedback/control for PWM (Pulse Width Modulation) signals
• Floating point (tri-state) control
• On/Off control

Power Supply

• 24 VAC power supply
• 24 VDC power supply

Key Features

• Non-spring return design for reliable, bidirectional positioning
• 45 in-lb torque output suitable for medium-duty damper and valve applications
• Multi-function technology (MFT) allows field configuration of control type without hardware changes
• Compact, direct-coupled design for easy installation
• Suitable for use in commercial HVAC and building automation systems
• Manufactured by Belimo, a global leader in actuator and valve technology

Applications

• HVAC damper actuation in air handling units (AHUs)
• VAV box and zone damper control
• Building automation and energy management systems
• Commercial and industrial HVAC installations

The LRB24-MFT’s multi-function capability reduces the need to stock multiple actuator models, streamlining inventory and simplifying field service. Its compatibility with 24 VAC and 24 VDC power sources, combined with support for analog, PWM, floating point, and On/Off control signals, makes it one of the most adaptable actuators in the Belimo lineup.