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ORIGINALS

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GAC ESD5111

Original speed controllers and actuators for generator sets

Original speed controllers and actuators GAC (Governor America Corp) y Doosan for generator sets. All products are genuine manufacturer items with direct part numbers. Express shipping within 24–48 hours.

GAC Speed Controllers — ESD Series

GAC's ESD series controllers regulate motor speed by adjusting the signal sent to the actuator that controls fuel intake. Isochronous operation with variable droop; PIDs adjustable via front-panel potentiometers without the need for software. Compatible with electronic actuators from the GAC range.

  • ESD-2402-12: 12V speed controller, entry-level model
  • ESD-5111: standard isochronous regulator, the most widely used model in the ESD range
  • ESD-5131: an enhanced version of the ESD-5111 with additional features
  • ESD-5500E: high-performance regulator offering greater precision and stability
  • ESD-5550: High-end model in the ESD series, isochronous with variable droop, start-up ramp, auxiliary inputs, and anti-windup circuit

GAC Actuators

Actuators are the mechanical components that receive signals from the control unit and physically regulate the engine's fuel intake. They are available in 12V and 24V versions, depending on the unit's electrical system.

  • ADD-225S 12V: GAC 12V linear actuator
  • ADC-100 12V: GAC 12V linear actuator, medium force
  • ACE-275HD 24V: GAC 24V linear actuator, heavy-duty design for high-power motors

GAC Speed Sensor

  • MSP 6728-C: Magnetic speed sensor (pickup). Detects engine RPM as the teeth of the flywheel ring gear pass by. Required for ESD series controllers that use an MPU signal.

Doosan Controller and Actuator

  • DSC-1000: Original Doosan speed governor for Doosan-engine-powered generator sets
  • Actuator 300701-00133: Genuine Doosan actuator for Doosan engines

What actuator do I need for my GAC regulator?

The choice of actuator depends on the motor and the installation space. If you have the model number of the unit or the motor, contact us at and we will confirm the correct regulator-actuator combination for you.

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