Belimo FSTF24-S Fire Smoke Damper Actuator in-lb Spring Return - 18 24V

The Belimo FSTF24-S is a UL-listed fire and smoke damper actuator designed for critical life safety applications in commercial HVAC systems. This spring return actuator provides reliable fail-safe operation during fire or smoke events, automatically returning to the safety position when power is removed.

Key Specifications:

• Torque: 18 in-lb (2 Nm) running torque for positive damper control
• Power Supply: 24V AC/DC operation for flexible installation
• Control: On/Off (two-position) control with spring return to safety position
• Switching: Dual 2SPST auxiliary switches for status feedback and integration
• Connection: Factory-installed 1-meter (39-inch) cable for quick installation
• Runtime: 90 seconds typical for full stroke
• UL Certified: UL 60730-1 and UL 60730-2-14 for fire and smoke damper applications

Features & Benefits:

• Spring return mechanism ensures fail-safe damper closure during power loss or emergency conditions
• Compact, robust housing suitable for mounting directly on damper shafts
• Universal mounting bracket with adjustable angle for easy installation in tight spaces
• Manual override mechanism allows for testing and maintenance without removing actuator
• Wide ambient operating range from -22°F to 131°F (-30°C to 55°C)
• Position indication shows open/closed status at a glance

This actuator is ideal for controlling fire and smoke dampers in air handling systems, stairwell pressurization, and smoke evacuation applications where code-compliant life safety performance is required.