The Barber Colman EA-57 is a medium torque electric valve actuator designed for proportional positioning of valves and dampers in HVAC and combustion control systems. Operating on a 120V AC motor with a 40-second travel time over 90°, this actuator provides 200 in-lb torque and includes an SPDT auxiliary switch. Ideal for applications requiring floating or proportional control with feedback, the EA-57 is compatible with Barber Colman MP-453 systems and VB-7000/VB-9000 valve bodies.
Technical Specifications
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Model: EA-57
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Motor Voltage: 120V AC
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Timing: 40 seconds for 90° rotation
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Torque Output: 200 in-lb
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Control Action: Floating or proportional with slidewire feedback
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Slidewire Feedback: 100 ohm
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Auxiliary Switch: 1x SPDT, adjustable
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Rotation Range: 45° to 320°, adjustable
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Connections: Coded screw terminals
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Mounting Orientation:
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Damper: Upright recommended
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Valve: Upright with actuator above valve centerline
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Ambient Temperature Range: -40 to 136°F (-40 to 58°C)
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Humidity: 5 to 95% RH, non-condensing
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Case Material: Die-cast aluminum with dual ½” conduit knockouts on each side
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Motor and Gear Train: Oil-immersed
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Dimensions: 7″ H x 5-3/8″ W x 6-5/16″ D
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Weight: 8 lbs
Key Features
-Medium-torque electric actuator for valves and dampers
-Compatible with MP-453 systems and Barber Colman VB-7000 / VB-9000 valves
Reversible proportional motor can stop at any position within travel range
Slidewire feedback enables precise positioning in modulating control applications
Adjustable rotation range from 45° to 320° for flexible field configuration
Built-in SPDT auxiliary switch for position feedback or control interlock
Oil-immersed motor and gears ensure long life and smooth operation
UL/cUL listed (except models with transformers)
Compatible Components & Accessories
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MP-453 control systems
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VB-7000 and VB-9000 valve bodies
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Auxiliary switch kits
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Mounting brackets and linkages
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Control panels using SPDT floating control logic
Industry Applications
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HVAC valve and damper automation
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Burner and combustion air control
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Process heating and cooling systems
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Building automation and zone control
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Retrofit and OEM installations requiring floating or proportional positioning
Installation & Maintenance Notes
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Mount actuator upright to prevent moisture ingress and ensure proper gear lubrication
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Connect to floating or proportional control systems using SPDT signal logic
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Set rotation limits and auxiliary switch as required for the application
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Perform regular inspections for mechanical wear and electrical integrity
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Replace only with Barber Colman or Schneider Electric approved parts
EA57-00000-000-0-00: Contact Controlled, 120Vac/60Hz, 100 Ohm Slidewire Feedback
EA57-00001-000-0-00: Contact Controlled, 120Vac/50Hz, 100 Ohm Slidewire Feedback
EA57-00003-000-0-00: Contact Controlled, 240Vac/60Hz, 100 Ohm Slidewire Feedback
EA57-00004-000-0-00: Contact Controlled, 240Vac/50Hz, 100 Ohm Slidewire Feedback
EA57-21370-000-0-00: 4-20mA Input, Rain Tight Housing, NEMA 4 Cover, 120Vac/60Hz, 100 Ohm Slidewire Feedback
EA57-21373-000-0-00: 4-20mA Input, Rain Tight Housing, NEMA 4 Cover, 240Vac/60Hz, 100 Ohm Slidewire Feedback
EA57-21374-000-0-00: 4-20mA Input, Rain Tight Housing, NEMA 4 Cover, 240Vac/50Hz, 100 Ohm Slidewire Feedback
EA57-00370-000-0-00: Contact Controlled, NEMA 4 Cover, 120Vac/60Hz, 100 Ohm Slidewire Feedback
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EA57