Belimo FSLF230-SUS Fire and Smoke Damper Actuator 230V 30 in-lb Spring Return

The Belimo FSLF230-SUS is a spring-return actuator designed for the operation of smoke and combination fire and smoke dampers in ventilation and air-conditioning systems. This actuator delivers 30 in-lb (3.5 Nm) of torque and operates on 230 VAC, 50/60 Hz with a nominal voltage range of 207-253 VAC.

Key Features:

• Operating temperature range from 32°F to 350°F (0°C to 177°C)
• Spring return fail-safe operation for reliable damper closure during power loss
• On/Off control with 2 x SPST auxiliary switches for position indication
• Meets UL555 and UL555S requirements when tested as an assembly with the damper
• Complies with UBC requirements for 15-second opening and closing
• Suitable for dampers up to 4 sq.ft. at 350°F

This actuator is engineered to provide life-safety performance in critical fire and smoke control applications. The spring return mechanism ensures the damper closes automatically in the event of power failure, making it ideal for smoke containment and fire-rated barrier applications in commercial HVAC systems.