Description
Belimo NRX24-SR-T-N4 Non-Spring Return Damper Actuator Overview
The Belimo NRX24-SR-T-N4 is a heavy-duty, non-spring return rotary damper actuator engineered for precise modulating control in commercial and industrial HVAC applications. Designed to deliver reliable, repeatable performance, this actuator is well-suited for air handling units, VAV systems, and building automation applications where accurate damper positioning is critical.
Key Features
- Non-spring return operation for reliable, bi-directional damper control
- 70 in-lb (8 Nm) torque output — suitable for medium to large damper assemblies
- Modulating 2–10 Vdc control signal for precise proportional positioning
- 24 Vac / 24 Vdc power supply for flexible system integration
- Terminal strip (T) wiring connections for clean, secure field wiring
- NEMA 4 (N4) rated enclosure — provides protection against splashing water, dust, and corrosion for demanding environments
- Belimo’s proven direct-coupled design — no crank arms or linkages required
- Manual override function for commissioning and emergency operation
- Visual position indicator for quick, at-a-glance damper status
Specifications
- Brand: Belimo
- Model / SKU: NRX24-SR-T-N4
- Actuator Type: Non-Spring Return, Rotary
- Torque: 70 in-lb
- Control Signal: 2–10 Vdc (Modulating)
- Power Supply: 24 Vac / 24 Vdc
- Wiring: Terminal Strip (T)
- Enclosure Rating: NEMA 4 (N4)
Applications
- Commercial air handling units (AHUs)
- Variable air volume (VAV) systems
- Building automation and energy management systems
- Industrial ventilation and process control dampers
- Outdoor or wash-down environments requiring NEMA 4 protection
Why Choose Belimo?
Belimo is a globally recognized leader in actuator technology, known for engineering products that deliver long service life, low maintenance, and seamless integration with modern building automation systems. The NRX series is built to meet the demands of commercial HVAC professionals who require dependable, accurate control in challenging installation environments.







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