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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.
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MS4120F1006/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST), Bulk Pack
alt
MS4120F1006/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST)
alt
MS4120F1204/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST), 2x Aux Switch, Bulk Pack
alt
MS4120F1204/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST), 2x Aux Switch
alt
MS4620F1005/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST), Bulk Pack
alt
MS4620F1005/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST)
alt
MS4620F1203/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST), 2x Aux Switch, Bulk Pack
alt
MS4620F1203/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST), 2x Aux Switch
alt
MS8120F1002/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,24 Vac, 2-position (SPST), Bulk Pack
alt
MS8120F1002/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,24 Vac, 2-position (SPST)
Image
SKU
Description
alt
MS4120F1006/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST), Bulk Pack
alt
MS4120F1006/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST)
alt
MS4120F1204/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST), 2x Aux Switch, Bulk Pack
alt
MS4120F1204/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,120 Vac, 2-position (SPST), 2x Aux Switch
alt
MS4620F1005/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST), Bulk Pack
alt
MS4620F1005/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST)
alt
MS4620F1203/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST), 2x Aux Switch, Bulk Pack
alt
MS4620F1203/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,230 Vac, 2-position (SPST), 2x Aux Switch
alt
MS8120F1002/B
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,24 Vac, 2-position (SPST), Bulk Pack
alt
MS8120F1002/U
Fire and Smoke Actuator, Spring Return, 175 lb-in, 20 Nm,24 Vac, 2-position (SPST)