Belimo SY4-120MFT 120V Spring Return Damper Actuator 3560 lb-in Torque

The Belimo SY4-120MFT is a high-torque spring return damper actuator designed for commercial HVAC applications requiring fail-safe positioning. This non-spring return (NSR) actuator delivers an impressive 3,560 lb-in of torque, making it suitable for large dampers and demanding applications.

Key Features:

• 120V AC power supply for standard commercial installations
• Accepts both 2-10 VDC and 4-20 mA control signals for flexible integration
• Non-spring return (NSR) operation maintains position on power loss
• 3,560 lb-in torque rating handles oversized dampers and high static pressure applications
• Robust construction for reliable long-term performance
• Direct mount design simplifies installation on damper shafts

This actuator is ideal for critical HVAC zones, smoke control systems, and applications where precise damper positioning and high holding force are essential. The dual input capability (voltage or current signal) ensures compatibility with most building automation systems and controllers.