The Barber Colman MS-1233 is a compact, electronic damper actuator designed for precise proportional control of HVAC dampers and air handling systems. Operating at 24V with a standard 4–20 mA DC input signal, this actuator delivers accurate modulating control with a torque output of 20 lb-in. It is ideal for applications requiring consistent airflow regulation and smooth actuator response in ventilation, zoning, and energy management systems.
Technical Specifications
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Model: MS-1233
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Type: Electronic Damper Actuator
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Control Type: Proportional (Modulating)
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Input Signal: 4–20 mA DC
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Power Supply: 24V, 50/60 Hz
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Torque Output: 20 lb-in
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Motion Type: Rotary
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Mounting: Direct mount or bracketed to damper shaft
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Housing: Compact design for tight installations
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Condition: New
Key Features
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4–20 mA proportional input for precise modulating control
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20 lb-in torque output suitable for small to medium damper applications
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Quiet, efficient electronic motor operation
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Designed for continuous-duty use in HVAC zoning and airflow regulation
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Operates on 24V low-voltage power systems
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Provides smooth and reliable position control in automated systems
Compatible Applications
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VAV boxes and terminal units
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Supply, return, and exhaust air dampers
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Zoned heating and cooling systems
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Air handlers and ventilation units
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Building automation and energy management systems
Installation & Maintenance Notes
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Wire actuator to match 4–20 mA control signal source
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Ensure 24V power supply is stable and properly fused
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Mount actuator securely to damper shaft or bracket
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Verify full-range motion and torque delivery during commissioning
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Periodically inspect wiring connections and test control response
We ship this product worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance