Description

The WOODWARD 9907-164​ is a robust, electronically controlled governor actuator designed for precise speed and load control of diesel engines, gas engines, and steam or gas turbines. Part of Woodward’s trusted lineup of actuator solutions, this unit translates control signals from a governor or PLC into precise mechanical movement of the engine’s fuel rack, throttle valve, or turbine control valve. Engineered for reliability in mission-critical applications, it ensures stable operation, accurate frequency regulation, and seamless load sharing in power generation, marine propulsion, and industrial drive systems.

Application Scenarios

In a remote natural gas compression station, two gas-fueled generator sets provide prime power for pipeline operations. Prior to the upgrade, the station experienced frequent frequency fluctuations during load transfers, causing protective trips and unscheduled downtime. The maintenance team replaced the aging hydraulic actuators with WOODWARD 9907-164​ electronic actuators on both units.

Configured to accept 4–20 mA control signals from the plant’s master controller, the 9907-164​ actuators provided fast, repeatable positioning of the engine fuel racks. During a simulated grid loss, the units demonstrated rapid response, maintaining frequency within ±0.1 Hz of the setpoint. The result was a significant improvement in power quality and a reduction in nuisance tripping. The station manager stated, “The Woodward actuators gave us the stability we needed to keep the gas flowing without interruption.”

Technical Principles and Innovative Values

Innovation Point 1: High-Precision Position Control – The WOODWARD 9907-164​ uses a closed-loop control algorithm to translate the input signal into exact actuator position. This ensures that fuel delivery or valve opening matches the commanded value, critical for maintaining engine speed and power output under varying loads.

Innovation Point 2: Rugged Environmental Design – Built with a sealed, corrosion-resistant housing rated IP65. the actuator withstands vibration, moisture, salt spray, and extreme temperatures. This makes it ideal for offshore platforms, desert installations, and arctic conditions where reliability is paramount.

Innovation Point 3: Fast Dynamic Response – With response times under 100 ms, the 9907-164​ reacts quickly to governor commands, minimizing frequency deviation and improving transient stability in generator sets and mechanical drive systems.

Innovation Point 4: Integrated Diagnostics & Feedback – Optional position feedback and diagnostic signals allow the control system to monitor actuator health in real time. Fault conditions such as loss of feedback, overtravel, or internal faults are flagged, enabling predictive maintenance and reducing unplanned outages.

Application Cases and Industry Value

A regional power utility upgraded the governor actuators on its standby diesel generator fleet serving hospitals and data centers. The previous pneumatic actuators were slow and prone to drift, causing extended start-up times and frequency instability during black start events.

By retrofitting with WOODWARD 9907-164​ actuators, the utility achieved near-instantaneous response to load pickup, reducing generator synchronization time by 60%. The actuators’ robust design also eliminated maintenance issues related to air leaks and seal failures. The operations director commented, “We’ve gone from worrying about generator performance to taking it for granted. The Woodward actuators are that dependable.”

Related Product Combination Solutions

To build a complete governor and control solution around the WOODWARD 9907-164. consider these complementary components:

WOODWARD 2301A / 2301D Speed Governor: Generates the control signal based on speed/frequency error for the 9907-164​ actuator.

WOODWARD EGCP-3 / EGCP-2 Generator Control Panels: Integrate the actuator with generator protection, metering, and synchronization functions.

WOODWARD DSM Series Digital Servo Modules: Provide enhanced control and feedback for multiple actuators in complex systems.

WOODWARD Flex500 / Flex800 Controllers: Offer scalable control platforms for integrating the 9907-164​ into plant-wide automation schemes.

WOODWARD Position Feedback Devices: Potentiometers or LVDTs for closed-loop monitoring of actuator position.

WOODWARD Actuator Mounting Kits: Custom brackets and linkages for specific engine or turbine models.

WOODWARD NetCon Software: Configuration and diagnostic tool for tuning and troubleshooting the 9907-164​ actuator.

Installation, Maintenance, and Full-Cycle Support

Installation and Commissioning: The WOODWARD 9907-164​ is typically mounted directly to the engine or turbine’s fuel control linkage. Installation involves aligning the actuator, connecting the 24 VDC power and control signal wires, and verifying mechanical travel. Commissioning includes setting the stroke limits, calibrating the feedback device (if used), and tuning the governor parameters for optimal response.

Maintenance and Lifecycle Support: Routine maintenance involves inspecting linkage for wear, checking electrical connections, and verifying actuator response during periodic tests. The sealed design minimizes exposure to contaminants, reducing maintenance intervals. In the event of a fault, the actuator’s diagnostic output aids in rapid troubleshooting.

We provide comprehensive support for the WOODWARD 9907-164. including sourcing genuine actuators, technical assistance with selection and installation, and lifecycle management to ensure long-term reliability. Our goal is to help you achieve precise, dependable control of your prime movers in any environment.