Belimo SFG-S2-L - rotary actuator for dampers with spring return

Belimo SFG-S2-L – actuator for dampers

Rotary actuator with a safety function for operating dampers in stationary heating, ventilation and air-conditioning systems. Designed for air dampers with an area of up to approx. 4 m². If the power supply is interrupted, the spring moves the damper to the safety position. The device is suitable for outdoor use and protected against UV radiation, rain, snow, dirt, dust and air humidity.

Key features and specifications

• Motor and safety function torque: 20 Nm.
• Rated voltage: AC 24...240 V / DC 24...125 V; frequency 50/60 Hz.
• Control: Open/Close; safety function direction of rotation: L (ccw).
• Motor running time: 75 s / 90°; safety function running time: <20 s @ -20...50°C, <60 s @ -30°C.
• Auxiliary switches: 2x SPDT, 1x 10% / 1x 11...100%.
• Power consumption during operation: 7 W; at rest: 3.5 W; sizing power for cable selection: 18 VA.
• Angle of rotation: max. 95°, adjustable using a mechanical end stop; mechanical position indicator.
• Manual operation using a crank and locking switch.
• Mechanical connection: universal clamp 12...26.7 mm.
• Power and control connection: 1 m cable, 2x 0.75 mm², FRNC (halogen-free); auxiliary switch connection: 1 m cable, 6x 0.75 mm², FRNC (halogen-free).
• Degree of protection: IP66/67; NEMA 4X; UL Enclosure Type 4X housing.
• Ambient temperature: -30...50°C [-22...122°F].

Note: The device is not intended for use in corrosive environments or where chemical effects from gases or liquids occur.