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    Rotary Actuators

    MSxx20F 175 lb-in. Fire and Smoke Damper Actuators

    The MS4120, MS4620, and MS8120 are spring return direct coupled actuators (DCA) for Fire and Smoke dampers.

    Overview

    The MS4120F, MS4620F, MS8120F Fast-Acting, Two-Position Actuators are spring return direct coupled actuators (DCA) for on/off damper control. The actuator accepts an on/off signal from a single-pole, single-throw (spst) controller. Reversible mounting allows actuator to be used for either clockwise (cw) or counterclockwise (ccw) spring rotation.

    Features & Benefits:
    • 175 lb-in. (20 Nm) minimum driving torque at 350°F (176°C)
    • Reversible mounting facilitates use in either clockwise (cw) or counterclockwise (ccw) spring rotation
    • Integral spring return ensures level of return torque
    • Stainless steel internal spring
    • Fifteen-second spring return timing
    • No special cycling required during long-term holding
    • No audible noise during holding
    • Models available for 24, 120, and 230 Vac applications
    • Ninety-five degree angle of rotation
    • Actuator holds rated torque at reduced power level
    • Die-cast aluminum housing
    • Housing design allows flush mounting to damper
    • Patented Self-Centering Shaft Adapter (SCSA). Patent Number: US 6,505,991
    Certifications:
    • Designed to operate reliably in smoke control systems requiring Underwriter’s Laboratories Inc. UL555S ratings up to 350°F.
    Others
    Name
    Description
    File Size
    Date
    Size
    MSXX20F, S2024-F, S20230-F Series Specification Data
    application/pdf 242.83 KB
    6/26/2023
    242.83 KB
    Fire and Smoke Damper Actuator Field Replacement Guide
    application/pdf 1.14 MB
    6/19/2023
    1.14 MB
    Installation Instructions
    Name
    Description
    File Size
    Date
    Size
    MSxx20F Tandem Mounting Installation Instructions
    application/pdf 278.99 KB
    6/19/2023
    278.99 KB
    Data Sheet
    Name
    Description
    File Size
    Date
    Size
    China Hazardous Substance Table
    application/pdf 171.74 KB
    9/1/2016
    171.74 KB
    MS4120F, MS4620F,S, MS8120F,S, S2024-F, S20230-F Fast-Acting, Two-Position Actuators Product Data
    application/pdf 1.12 MB
    11/1/2016
    1.12 MB
    MS4120F, MS4620F,S, MS8120F,S, S2024-F, S20230-F Specification Data
    application/pdf 313.9 KB
    6/26/2023
    313.9 KB
    Name
    Description
    File Size
    Date
    Size
    MSxx20F Tandem Mounting Installation Instructions
    application/pdf 278.99 KB
    6/19/2023
    278.99 KB
    China Hazardous Substance Table
    application/pdf 171.74 KB
    9/1/2016
    171.74 KB
    MS4120F, MS4620F,S, MS8120F,S, S2024-F, S20230-F Fast-Acting, Two-Position Actuators Product Data
    application/pdf 1.12 MB
    11/1/2016
    1.12 MB
    MS4120F, MS4620F,S, MS8120F,S, S2024-F, S20230-F Specification Data
    application/pdf 313.9 KB
    6/26/2023
    313.9 KB
    MSXX20F, S2024-F, S20230-F Series Specification Data
    application/pdf 242.83 KB
    6/26/2023
    242.83 KB
    Fire and Smoke Damper Actuator Field Replacement Guide
    application/pdf 1.14 MB
    6/19/2023
    1.14 MB
    Name
    Description
    File Size
    Date
    Size
    MSXX20F, S2024-F, S20230-F Series Specification Data
    242.83 KB
    6/26/2023
    Fire and Smoke Damper Actuator Field Replacement Guide
    1.14 MB
    6/19/2023
    MSxx20F Tandem Mounting Installation Instructions
    278.99 KB
    6/19/2023
    China Hazardous Substance Table
    171.74 KB
    9/1/2016
    MS4120F, MS4620F,S, MS8120F,S, S2024-F, S20230-F Fast-Acting, Two-Position Actuators Product Data
    1.12 MB
    11/1/2016
    MS4120F, MS4620F,S, MS8120F,S, S2024-F, S20230-F Specification Data
    313.9 KB
    6/26/2023