BELIMO NFA-S2
A high-performance actuator for HVAC applications. It ensures precise control of air and fluid systems, contributing to energy savings and improved system efficiency in industrial and commercial environments.
Key Features
- 10 Nm torque for dampers or small valves
- AC 24–240 V / DC 24–125 V universal supply
- Spring‑return fail‑safe on power loss
- Two integrated SPDT auxiliary switches
- Manual override via hand‑crank & locking switch
- IP54 rated housing for indoor HVAC use
৳ 0.00
Description
The BELIMO NFA‑S2 actuator is designed to bring safety, reliability, and ease of operation to ventilation, HVAC and valve/damper control systems. Its 10 Nm torque is sufficient for most dampers up to ~2 m² or for small-to-medium valves, making it well suited for air distribution dampers, zone dampers, fire dampers, or mixing valves in residential, commercial or light‑industrial installations. hvac.co.th+2HVACPA+2
One of the main advantages of the NFA‑S2 is its spring‑return “fail‑safe” feature: if power is lost — for instance during a blackout or emergency — the actuator automatically returns the damper or valve to a safe position, preventing uncontrolled airflow or fluid flow. belimo.dk+2belimo-sklep.pl+2
The actuator is built for ease and flexibility: it accepts a wide supply voltage (AC 24–240 V or DC 24–125 V), and mounts directly on damper or valve shafts using a universal shaft clamp (10–25.4 mm) with anti‑rotation strap, making installation quick and straightforward. belimo-sklep.pl+1
For building automation or safety systems, the two integrated SPDT auxiliary switches provide feedback (e.g. damper/valve open or closed), enabling signalling or interlock functions. Scribd+1
Maintenance is minimal: the actuator is service‑free, housed in a durable IP54 enclosure suitable for typical HVAC indoor environments, and includes manual override (hand‑crank with locking switch) for manual control or commissioning. HVACPA+1
Compared to basic on/off actuators or manual dampers, NFA‑S2 delivers a safer, more reliable, automation‑ready, maintenance‑free solution — ideal for ventilation, fire-safety dampers, zone control, or any application where fail‑safe positioning and consistent control are critical.
Specifications
- Actuator type: Rotary spring‑return actuator, model NFA‑S2 Belimo+1
- Torque: 10 Nm (motor and fail‑safe spring) belimo-sklep.pl+1
- Supply voltage: AC 24…240 V / DC 24…125 V, 50/60 Hz belimo.com.ua+1
- Control type: On/Off (open/close) belimo-sklep.pl+1
- Angle of rotation: approx. 95° (adjustable with mechanical end stops) belimo-sklep.pl+1
- Running time (motor, 90°): 75 s / 90° belimo-sklep.pl+1
- Fail‑safe (spring return) return time: < 20 s (at normal temperature) belimo-sklep.pl+1
- Auxiliary switches: 2 × SPDT (1 fixed at ~10%, 1 adjustable 11–100%) for position signalling Scribd+1
- Mechanical interface: universal shaft clamp for shaft diameter 10–25.4 mm, anti‑rotation strap included belimo-sklep.pl+1
- Protection class: IP54 (dust and splash resistant) HVACPA+1
- Ambient operating temperature: –30…+50 °C, humidity up to 95% RH (non‑condensing) Scribd+1
- Housing / insulation rating: Reinforced insulation, meets EN/IEC 60730 / UL 60730 safety standards Belimo+1
- Maintenance: maintenance‑free design (no limit switches required; overload protection built in) Belimo+1
- Manual override: Hand‑crank + locking switch for manual positioning when required belimo.com.ua+1
The BELIMO NFA‑S2 actuator is available through authorized HVAC equipment distributors and importers servicing Bangladesh. Final cost depends on exchange rate, shipping charges, and local dealer margin. For current availability and local quotations, please contact trusted HVAC wholesalers or certified BELIMO suppliers active in Bangladesh.
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