Overview
The Belimo FSTF120.1 US is a 120V spring-return damper actuator designed for retrofit and standard fire and smoke damper assemblies.
Features
- Spring-return fail-safe positioning upon main power loss
- Reversible fail-safe rotation direction using flexible mounting orientation
- Direct shaft coupling with coldweld clamp design
- Meets UL555 and UL555S assembly standards
Specifications
- Actuator Type: Spring return
- Voltage: AC 120 V
- Control Type: On/Off
- Torque: 18 in-lb [2 Nm]
- Running Time (Motor): 75 s @ 250°F [121°C]
- Running Time (Fail-safe): <25 s
- Degree of Protection: IP42, NEMA 2, UL Enclosure Type 2
Applications
- Retrofit and replacement of fire and smoke damper actuators
- Ventilation and air-conditioning smoke control systems



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