Belimo FSLF120 Actuator

The Belimo FSLF120 Actuator is a 120 VAC spring-return motor engineered specifically for fire and smoke damper applications. Delivering 30 in-lb of torque, this fail-safe actuator ensures reliable containment in high-temperature environments, rated for 350°F operation for 30 minutes. As an on/off control solution, it facilitates rapid response with a motor running time of 15 seconds and a fail-safe spring return in under 15 seconds. This model is the direct replacement for FSLF120-FC, featuring a 1m (3ft) cable and a 1/2-inch NPT conduit connector for streamlined field installation. Its galvanized steel housing and UL555S listing make it a standard choice for contractors maintaining multi-section dampers where UL2043 plenum rating is required. Use this HVAC life safety actuator to maintain code compliance in ventilation systems, ensuring tight close-off in the event of power loss.

• UL555S Compliance: Designed and tested to meet rigorous safety standards for fire and smoke containment.
• Direct Retrofit: Seamlessly replaces the legacy FSLF120-FC model without additional mounting brackets.
• Rapid Fail-Safe: Efficiently closes dampers in less than 15 seconds during emergency power interruptions.
• High-Temp Performance: Rated to withstand 350°F, ensuring structural integrity during critical fire events.
• Robust Construction: Features a galvanized steel enclosure and maintenance-free brushless DC motor technology.

Is the FSLF120 compatible with all damper shafts?
This actuator is designed for direct-coupled mounting on 3/8" to 1/2" round or square shafts. For larger dampers exceeding 4 sq. ft., verify torque requirements as the FSNF series may be required.

What is the difference between the FSLF120 and FSLF120-S?
The standard FSLF120 provides on/off operation, while the "-S" variant includes integrated auxiliary switches for remote position feedback.

Can I use this to replace a competitor's smoke actuator?
Yes, the FSLF120 is frequently used as a replacement for Honeywell or Siemens fire/smoke actuators in field retrofits, provided the 30 in-lb torque rating is sufficient for the existing damper size.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.