Belimo GRB24-MFT-5 Actuator

The Belimo GRB24-MFT-5 Rotary Actuator is a versatile solution designed for high-torque applications in commercial HVAC systems, providing 360 in-lb [40 Nm] of force for large control dampers and ball valves. Operating on 24V AC/DC power, this non-spring return (NSR) actuator utilizes Multi-Function Technology (MFT), allowing contractors to field-configure control signals for 2-10 VDC, 4-20 mA, or pulse width modulation. Its brushless DC motor ensures consistent timing and torque delivery across its full 95-degree rotation, preventing actuator hunting and ensuring precise flow control in varied static pressure environments. The NEMA 2 (IP54) housing facilitates reliable operation in mechanical rooms, while the universal clamp supports 1/2" to 1.05" round shafts. For integration into building automation systems (BAS), the field-programmable parameters provide unmatched flexibility for proportional control and feedback requirements.

• Configurable MFT Electronics: Allows field adjustment of control input, feedback signals, and running time to meet specific sequence of operation requirements.
• High Torque Output: Delivers 360 in-lb of torque, making it ideal for large-scale damper assemblies and high-pressure butterfly valve applications.
• Manual Override: Features an external push-button manual gear release to simplify installation, commissioning, and emergency maintenance.
• Electronic Overload Protection: Eliminates the need for limit switches by sensing stall conditions, extending the motor life under high-load cycles.
• Universal Compatibility: Standardized mounting bracket and input signals ensure seamless replacement of legacy Belimo globe valve actuators and damper drives.

Common Questions

How do I change the control signal on a Belimo GRB24-MFT-5?
The control signal is field-adjustable using the Belimo PC-Tool or the ZTH US handheld tool. It can be set for proportional (VDC/mA), floating point, or on/off control logic.

Can this actuator be used in failsafe applications?
No, the GRB24-MFT-5 is a non-spring return actuator. For applications requiring a safety return position upon power loss, a spring-return model or an external power backup solution is required.

What is the typical running time for this unit?
The factory default running time is 150 seconds for 90 degrees, though this is programmable via MFT settings to range between 70 and 300 seconds depending on the system needs.

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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.