MSxx20F 175 Lb-In

MSxx20F 175 Lb-In. Fire And Smoke Damper Actuators
The MS4120, MS4620, and MS8120 are spring return direct coupled actuators (DCA) for Fire andSmoke dampers.
Overview

The MS4120F, MS4620F, MS8120F Fast-Acting, Two-Position Actuators are spring return direct coupled actuators (DCA) foron/off damper control. The actuator accepts an on/off signal from a single-pole, single-throw (spst) controller. Reversiblemounting allows actuator to be used for either clockwise (cw) or counterclockwise (ccw) spring rotation.
Features & Benefi ts:
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-fi ve degree angle of rotation
Actuator holds rated torque at reduced power level
Die-cast aluminum housing
Housing design allows fl ush mounting to damper
Patented Self-Centering Shaft Adapter (SCSA). Patent Number: US 6,505,991
Certifi cations:
Designed to operate reliably in smoke control systems requiring Underwriter’s Laboratories Inc. UL555S ratings up to 350°F.