Schneider Electric (Barber Colman) MP-451 Proportional Actuator

The Schneider Electric (Barber Colman) MP-451 Proportional Actuator is a heavy-duty, non-spring return rotary actuator engineered for the precise positioning of dampers and globe valves in industrial HVAC systems. This 120V proportional actuator delivers a consistent 220 lb-in torque, ensuring reliable mechanical movement even in high-static applications. Operating on 120 VAC power at 0.65 Amps, the motor features an oil-immersed gear train housed in a rugged die-cast NEMA 1 enclosure, designed to handle ambient temperatures from -40 to 136°F. This unit is the direct industry replacement for the legacy Barber Colman EA-58 and MF-451 models.

For advanced system feedback and automation, the MP-451 is equipped with a built-in SPDT auxiliary switch and a feedback potentiometer. The actuator provides a full 180-degree rotation with an 80-second timing (no load), allowing for gradual, stable adjustments in heating and ventilation flaps. Terminal block connections simplify field wiring, while the 0.9 Amp rated SPDT auxiliary switch allows for seamless integration with secondary control circuits or status indication lamps.

• Direct Compatibility: Engineered as a drop-in replacement for Barber Colman EA-58 and MF-451 actuators, minimizing downtime during retrofits.
• High Torque Output: Delivers 220 lb-in torque to reliably drive larger damper banks and high-pressure globe valves.
• Industrial Durability: Features an oil-submerged gear train for reduced friction and extended component life in demanding environments.
• Integrated Feedback: The SPDT auxiliary switch and feedback potentiometer provide precise position tracking for building automation systems.

• Can I use this for spring-return applications? No, the MP-451 is a non-spring return actuator. If power is lost, the actuator maintains its last position.
• Is this compatible with 24V control signals? The MP-451 is a 120V line-voltage unit. For low-voltage control integration, verify your specific controller requirements or the necessity of an interface module.
• What is the maximum rotation of this unit? This model is set for 180-degree rotation, but can be used in 90-degree stroke applications with appropriate linkage adjustment.

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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.