Description
Ruskin L120-S 120V Spring-Return Damper Actuator with Auxiliary Switch
The Ruskin L120-S is a heavy-duty 120-volt, 2-position spring-return damper actuator engineered for dependable performance in commercial and industrial HVAC applications. Delivering 177 in-lb of torque, this actuator provides the muscle needed to reliably drive large or high-resistance dampers to their open or closed position — and return them to the fail-safe position automatically upon power loss.
Key Features
- Operating voltage: 120V AC
- Control type: 2-position (on/off)
- Actuator action: Spring-return (S/R) for fail-safe operation
- Output torque: 177 in-lb — suited for large commercial damper assemblies
- Integrated auxiliary switch (AuxSw) for end-of-travel feedback and interlock wiring
- Automatic spring-return ensures damper returns to safe position on power loss
- Designed for use with Ruskin and compatible commercial damper systems
Application
The L120-S is ideal for use in air handling units, smoke/fire damper control, exhaust and supply air systems, and building automation applications where reliable 2-position damper actuation and end-of-travel signaling are required. The built-in auxiliary switch enables integration with building controls, alarm panels, or interlock circuits for enhanced system coordination.
Why Choose the Ruskin L120-S
Ruskin is a trusted name in commercial airflow control. The L120-S combines robust spring-return fail-safety with high torque output and auxiliary switch functionality — all in a single, field-proven package. Whether you’re replacing an existing actuator or specifying for a new installation, the L120-S delivers the reliability and control your system demands.
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