BELIMO NFA24A-SR
A reliable and durable actuator designed for HVAC systems. It offers precise control of fluid and air flow, ensuring optimal system performance and contributing to energy-efficient operations.
Key Features
- 10 Nm torque for dampers/valves
- AC/DC 24 V supply, modulating 2–10 V control
- Spring‑return fail‑safe on power loss
- Position feedback 2–10 V output
- Manual override via hand crank
- IP54 rated, maintenance‑free housing
৳ 0.00
Description
The BELIMO NFA24A‑SR actuator is designed to bring dependable, automated control to dampers or small valves in HVAC and ventilation systems — especially where safety and reliability matter. With a torque of 10 Nm, it can comfortably operate dampers up to about 2 m² or equivalent small valves, making it well‑suited for air distribution dampers, small mixing valves, or zone dampers in residential and commercial buildings. Belimo+1
What distinguishes NFA24A‑SR is its fail‑safe spring‑return mechanism: in the event of power loss, the actuator automatically returns to a safe default position — closing a damper or valve to prevent uncontrolled airflow or fluid flow. This feature offers peace of mind for critical applications like smoke/ventilation dampers, fire‑safety circuits, or boiler backup systems. The modulating 2–10 V control with position feedback (2–10 V) enables precise positioning and easy integration with Building‑Management Systems (BMS) or control panels, allowing dynamic adjustment of airflow or flow rates based on real-time conditions.
Installation and maintenance are straightforward: the actuator mounts via a universal shaft clamp, and manual override with hand crank allows manual adjustment in maintenance or emergency scenarios. The device is maintenance‑free, compact, and housed in an IP54‑rated enclosure, making it suitable for indoor HVAC environments where humidity or dust may be present. Compared to generic on/off actuators or manual dampers, the NFA24A‑SR delivers smoother control, automation readiness, enhanced safety (fail‑safe), and long-term reliability — ideal for modern HVAC systems seeking performance and peace of mind. Belimo+2Bola Systems+2
Specifications
- Actuator type: modulating rotary actuator with spring‑return fail‑safe (“NFA24A‑SR” / in published data “NF24A‑SR”) Belimo+1
- Torque (motor & fail‑safe): 10 Nm Belimo+1
- Supply voltage: AC/DC 24 V, 50/60 Hz Belimo+1
- Control signal: DC 2…10 V for modulation Belimo+1
- Position feedback: DC 2…10 V (max 0.5 mA) Belimo+1
- Manual override: hand crank + locking switch for manual operation during maintenance or power failure Belimo+1
- Running time (motor): approx. 150 s / 90° rotation Belimo+1
- Angle of rotation: ~90° (for dampers/valves, depending on mechanical link) Belimo+1
- Protection rating: IP54 (suitable for indoor HVAC / ventilation environments) Belimo+1
- Ambient operating temperature: –30 … +50 °C Belimo
- Housing: sealed, maintenance‑free, suitable for damp or dusty indoor environments per HVAC standards Belimo+1
- Connection: cable 1 m, 4 × 0.75 mm² supply/control wiring as standard Belimo+1
The BELIMO NFA24A‑SR actuator is available through authorized HVAC equipment distributors and suppliers servicing Bangladesh. Final cost depends on import duties, shipping charges, and dealer margins. For current availability and accurate local pricing, please contact reliable HVAC wholesalers or certified BELIMO distributors active in Bangladesh.
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