Description
⚙️ Product Overview
The Woodward 9907-167 is a 505E Digital Governor designed for steam turbine speed and load control. It is a microprocessor-based turbine control unit used in industrial steam turbines, turbogenerators and related prime-mover applications.
The 9907-167 version uses an 18–32 VDC control power supply and provides control interfaces for turbine actuators, relay functions and programmable current signals.
🔧 Key Features
• Woodward 505E Digital Governor
• Model: 9907-167
• 18–32 VDC power supply
• Microprocessor-based digital turbine control
• Designed for steam turbine applications
• Two actuator outputs
• Eight relay outputs
• Six programmable current outputs
• Front-panel keypad and display
• Program upload/download capability
• Suitable for industrial turbine control and replacement applications
📋 Technical Information
• Brand: Woodward
• Model: 9907-167
• Product Family: 505E
• Product Type: Digital Governor / Turbine Control
• Application: Steam Turbine Control
• Control Power: 18–32 VDC
• Processor: 32-bit microprocessor-based control
• Actuator Outputs: 2
• Relay Outputs: 8
• Programmable Current Outputs: 6
• Display: 2 rows × 12 characters
• Keypad: 30 analog keys
• Installation: Industrial control panel
• Enclosure: NEMA 4 / optional NEMA 4X configuration depending on installation
⚡ Functional Description
The 9907-167 receives turbine operating signals and control commands, processes the configured turbine-control logic and generates actuator and auxiliary outputs.
In a typical steam-turbine installation, the governor regulates turbine speed and load by controlling steam admission through the connected actuators. The 505E platform is intended for applications such as industrial steam turbines, small turbogenerators and turboexpanders.
🏭 Typical Applications
• Industrial steam turbines
• Steam turbine generator sets
• Small turbogenerators
• Turboexpander control systems
• Mechanical-drive steam turbines
• Industrial power-generation equipment
• Turbine control-panel replacement projects
• Maintenance and spare-parts inventory
🖥️ Control & Interface Functions
The front panel provides operator access to the governor’s control functions and configuration. The unit supports program upload/download for configuration and maintenance.
The available actuator, relay and programmable current outputs allow the controller to interface with turbine valves, alarms, auxiliary equipment and other plant-control functions.
🛠️ Installation & Replacement Guide
Before replacing an existing 505E controller, verify the complete part number and application configuration.
• Isolate the turbine control system and follow site lockout procedures.
• Record the existing wiring and terminal assignments.
• Confirm the controller model is 9907-167.
• Verify the 18–32 VDC control-power supply.
• Check actuator and relay wiring before energizing the replacement.
• Verify programmed turbine parameters and control configuration.
• Perform input/output and actuator checks before returning the turbine to operation.
• Confirm all overspeed and shutdown functions according to the site’s commissioning procedure.
⚠️ Turbine governor replacement involves critical control and protection functions. Commissioning should be performed by qualified turbine-control personnel.
🔍 Identification
For purchasing and maintenance searches, use the following identifiers:
Woodward 9907-167
Woodward 505E
505E Digital Governor
Digital Turbine Control
Steam Turbine Governor
❓ FAQ
Q: What is Woodward 9907-167?
A: It is a Woodward 505E Digital Governor for steam-turbine control.
Q: What is the input power requirement?
A: The 9907-167 uses an 18–32 VDC control-power supply.
Q: Is it a PLC?
A: No. It is a dedicated turbine governor/control unit rather than a general-purpose PLC.
Q: How many actuator outputs does it have?
A: The available specifications identify two actuator outputs.
Q: Is 9907-167 suitable for steam turbines?
A: Yes. The 505E platform is designed for steam-turbine control applications.
Q: Can another 9907-series controller be substituted directly?
A: No. Different 505/505E variants can have different power-supply and application configurations. Match the complete part number and turbine-control configuration before replacement.
📦 Maintenance Spare
The Woodward 9907-167 is a useful replacement and maintenance spare for existing 505E turbine-control installations. When purchasing, verify the model number, power-supply version, hardware configuration and existing application before installation.
