Schneider Electric (Barber Colman) MP-424 Proportional Actuator

The Schneider Electric (Barber Colman) MP-424 Proportional Actuator is a heavy-duty non-spring return actuator designed for the precise positioning of dampers, globe valves, and ventilation flaps in commercial HVACR systems. Operating on 120V AC power, this unit delivers a consistent 60 lb-in torque to ensure reliable mechanical movement across a 90-degree rotation. Engineers often specify the MP-424 as a direct replacement for Barber Colman EA-51, EA51-00000-000, and EMP-424-1 models. Its oil-immersed gear train and rugged die-cast aluminum housing are engineered for longevity in demanding environments, maintaining performance even with proportional control signals from Microtherm or System 8000 controllers. The adjustable timing (13 to 130 seconds at no load) and integrated SPDT auxiliary switch provide field flexibility for sequencing and feedback, while the NEMA 1 enclosure protects internal components in standard mechanical room installations.

• Universal Compatibility: Serves as an identical high-torque replacement for EA-51 and EMP-424-1 series gear train actuators.
• Precise Control: Features a built-in feedback potentiometer for accurate proportional control in complex HVAC links.
• Durable Construction: The oil-immersed motor and die-cast housing dissipate heat efficiently, extending the service life of the 60 lb-in actuator.
• Flexible Field Setup: Includes two 1/2-inch conduit openings and an adjustable speed range to match specific damper or valve requirements.
• Enhanced Safety: Built-in SPDT auxiliary switch allows for easy integration of status tallies or secondary equipment interlocks.

Is the MP-424 compatible with older Barber Colman Microtherm systems?
Yes, the MP-424 actuator is designed to work seamlessly with Barber Colman Microtherm proportional electrical systems and common series like the TP-1xx and TP-1xxxx controllers.

Can I use this actuator for spring-return applications?
No, the Schneider Electric MP-424 is a non-spring return (NSR) motor. If your application requires a fail-safe position upon power loss, a different MP-series spring-return model must be selected.

How do I adjust the stroke or timing on this unit?
Timing is field-adjustable between 13 and 130 seconds via the internal drive settings. While the default rotation is 90 degrees, it can be calibrated for specific valve or damper strokes by a qualified HVAC technician.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.