Schneider Electric (Barber Colman) M800A Valve Actuator

The Schneider Electric (Barber Colman) M800A is a high-performance Forta Globe Valve Actuator designed for precise linear control in commercial HVACR systems. Operating on 24V AC/DC, this non-spring return (NSR) motor delivers a robust 180 lbf (800N) of linear force, making it an ideal choice for managing chilled water, hot water, and steam applications with VB-7000, VB-8000, or VB-9000 series valves. This U-bolt mounting version is engineered for versatility, supporting field-selectable floating or proportional control. It accepts standard 0 to 10Vdc, 2 to 10Vdc, and 4 to 20mA input signals (when used with the included 500 Ohm resistor) and provides a 2 to 10Vdc feedback signal for accurate position monitoring. The die-cast housing features a plenum-rated cover, meeting NEMA 2 (IP54) standards when mounted vertically, ensuring reliability in demanding mechanical environments.

• Universal Signal Compatibility: Supports proportional control and floating configurations with easy DIP switch selection for direct or reverse acting operation.
• Simplified Commissioning: Features a "One Touch" auto-calibration and auto-zero function that automatically adjusts the working range based on the valve stroke.
• Mechanical Versatility: The U-bolt mounting style allows for secure attachment to various valve necks, and the integrated manual override handle enables positioning during power loss.
• System Protection: Equipped with torque overload protection across the entire stroke to prevent motor burnout and valve damage.

Common Questions

How do I configure the M800A for 4-20mA control?
To utilize a 4 to 20mA input, connect the provided 500 Ohm resistor across the input terminals and set the internal DIP switches to the corresponding proportional mode described in the technical manual.

Is this actuator compatible with older Barber Colman valves?
The M800A is designed for modern Schneider Electric globe valves. Use with older series like the VB-9313 or competitors' valves typically requires AV-800 series linkage kits; always verify the valve neck diameter and stem size before installation.

Does this unit have a spring return safety feature?
No, the M800A is a non-spring return (NSR) actuator. For applications requiring a fail-safe position upon loss of power, a spring-return model from the Schneider Forta line should be used.

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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.