Belimo SFA-S2 Damper Actuator 20Nm

The Belimo SFA-S2 is a strong rotary damper actuator that gives HVAC systems 20 Nm of torque. It makes sure that it works safely using spring-return fail-safe functionality over a wide variety of voltages.

The Belimo SFA-S2 damper actuator is great for technical building installations because it can handle air dampers up to 4 m². It has a universal power supply that works with AC 24…240 V / DC 24…125 V @ 50/60 Hz. It has an 18 VA size power and a 7.0 W running usage for efficient performance. The Belimo SFA-S2 is perfect for tough ventilation settings since it has two built-in auxiliary switches for accurate signaling and is designed for open/close control.

Technical Specifications: belimo sfa-s2

Belimo sfa s2 Features:

1) The universal power module can handle both AC 24…240 V and DC 24…125 V, so you may set it up however you want without using voltage converters.

2) The spring-return fail-safe mechanism quickly puts the dampers back in a safe position when the power goes out, which makes the system more reliable.

3) With a hand crank and a locking switch, you can manually override the system to get it just right and make it easy to keep up.

4) Two extra switches (one fixed and one adjustable) let you send signals for rotation angles between 10% and 100%.

5) The overload-proof design with no limit switches stops automatically at end stops, which makes it very reliable.

Applications and Benefits

Perfect for HVAC damper control in ventilation systems, the Belimo SFA-S2 supports emergency positioning in commercial buildings and industrial setups. Its IP54 rating and wide temperature range suit indoor/outdoor use where protected from direct water or corrosives. Choose Belimo SFA-S2 for proven durability, easy integration, and compliance with CE, UL, and hygiene standards like VDI 6022.

Belimo sfa-s2 manual

Download Manual File

Usage Guide:

-> Use the universal clamp and anti-rotation bracket to mount directly on damper shafts (10…25.4 mm) for a safe and easy installation.

-> 1 m cable (2x 0.75 mm²) for wire supply and control; connect more switches independently (6x 0.75 mm²) while keeping an eye on voltage limitations.

-> Use the hand crank and scale indications to change the rotation angle and the locations of the auxiliary switches by hand while the power is off.

-> Check that the spring return finishes in less than 20 seconds at normal temperatures by cutting off the power.