The MS4620F 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 counter clockwise (ccw) spring rotation.

• Integral spring return ensures level of return torque
• Stainless steel internal spring
• No special cycling required during long-term holding
• No audible noise during holding
• Patent pending design eliminates need for limit switches to reduce power consumption
• Ninety-five degree angle of rotation
• Actuator holds rated torque at reduced power level
• Housing design allows flush mounting to damper
• High-temperature indicator included
• Self-centering shaft adapter (SCSA)
• High temperature Teflon lead wires
• Designed to operate reliably in smoke control systems