EA12 Spring Return Rotary Actuator

Brand: Eurotherm
Does not ship to United States

The Model EA12 actuator is a spring return gear driven crankshaft actuator for two position operation of dampers, values or other equipment that requires return to normal position upon power interruption.

The hardened steel crankshaft is driven through a train of precision hobbed gears.

The actuator is driven by a shaded pole motor that is completely submerged in oil and sealed in an aluminum case to assure long life and minimum maintenance.

The gear train of the EA12 crank actuator is also sealed in oil.

Working in conjunction with primary loop controllers, these power units are ideal for ON-OFF control of valves and dampers.

The EA12 travel time is 20 seconds and its travel limit is 170 degrees clockwise.

The spring return is counterclockwise to the original position when de-energized.
  • Spring return two position operation
  • 60 in-lbs torque - 20 seconds travel
  • Oil immersed motor and gear train
  • Compatible with VB series valves



Ambient Temperature Range

  • -40° to 58° C (-40° to 136° F)

Approvals & Certifications

  • UL (C,US)


  • Power Consumption: 70 W Running, 25 W Holding

Control Functions Characteristics

  • Control Action: 2-Wire, On-Off

Electrical Rating

  • Auxiliary Switch: 12 A at 120 Vac (2 A Full Load), Locked Rotor
  • Auxiliary Switch: 6 A at 240 Vac (1 A Full Load), Locked Rotor

Enclosure, Body Material

  • Die Cast Aluminum with 2 Conduit Openings


  • 60 Hz


  • 5 to 95 % Relative Humidity, Non-Condensing


  • 6” (152 mm) Clearance Above Wiring Compartment

Mounting Position

  • Output Shaft Horizontal


  • Shaft Rotation: CW 170° - 20 seconds when Power Applied

Switch Type

  • Auxiliary Switch: SPDT Makes or Breaks Circuit at Powered End of Stroke


  • 60 In/Lbs (20 seconds No Load Travel Time)
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