Description
The Belimo GRB24-3-7 is a reliable, direct-coupled damper actuator engineered for precise airflow and zone control in commercial and residential HVAC systems. Powered by 24V AC/DC, it offers both ON/OFF and floating point control modes, making it a versatile solution for a wide range of damper applications including air handling units, VAV systems, and ventilation control.
With a 90-second runtime, the GRB24-3-7 delivers smooth, consistent damper positioning that protects mechanical components and ensures stable system performance. Belimo’s proven actuator technology means long service life, minimal maintenance, and dependable operation in demanding environments.
Key Features
- Supply voltage: 24V AC/DC for broad system compatibility
- Control type: ON/OFF and floating point operation
- Runtime: 90 seconds for smooth, controlled damper movement
- Direct-coupled design — no crank arm or linkage required
- Compact, spring-return-ready form factor suitable for tight installations
- Suitable for use with zone dampers, air handling units, and ventilation systems
- Manufactured by Belimo, a global leader in HVAC actuator technology
Applications
- HVAC zoning and air distribution control
- Variable air volume (VAV) systems
- Air handling unit damper control
- Commercial ventilation and building automation systems
Why Choose Belimo?
Belimo is recognized worldwide for manufacturing high-quality, energy-efficient actuators and valves for HVAC applications. The GRB24-3-7 reflects Belimo’s commitment to precision engineering, ease of installation, and long-term reliability — making it a trusted choice for HVAC professionals and building automation contractors.







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