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The Woodward 8235-650 Actuator is an industrial actuator used to convert a control signal into mechanical movement. In turbine, engine, and other rotating-equipment control systems, the actuator is typically connected to a control valve, fuel mechanism, linkage, or other regulating mechanism.
The actuator works together with a controller and position-feedback system to move the controlled mechanism to the required position. Its application depends on the specific Woodward control architecture and the mechanical interface of the equipment.
The 8235-650 functions as the final actuation element in a control loop.
A typical arrangement is:
Controller → Actuator → Mechanical Linkage / Valve
with position feedback returning to the control system:
Actuator Position → Feedback Device → Controller
When the controller determines that the controlled mechanism needs to move, it sends the appropriate command to the actuator. The actuator converts this command into mechanical movement, adjusting the connected valve, linkage, or regulating mechanism.
In a closed-loop system, position feedback allows the controller to compare the commanded position with the actual position and make corrections when necessary.
| Application | Typical Use |
|---|---|
| Steam Turbines | Valve or governing mechanism actuation |
| Gas Turbines | Fuel or control mechanism positioning |
| Engine Control | Mechanical actuator operation |
| Power Generation | Turbine governing systems |
| Industrial Turbomachinery | Control-element positioning |
| Compressor Systems | Actuation of regulating mechanisms |
| Process Equipment | Mechanical control-element movement |
| Engine Test Systems | Actuator-driven control functions |
| Component | Function |
|---|---|
| Woodward 8235-650 | Converts control commands into mechanical movement |
| Servo Position Controller | Generates actuator-position commands |
| Position Feedback Device | Measures actuator position |
| Turbine / Engine Controller | Determines required control position |
| Control Valve / Linkage | Receives actuator movement |
| Power Supply | Provides actuator operating power |
| Field Wiring | Carries control and feedback signals |
The exact controller, feedback device, and mechanical linkage should be matched to the specific application.
The 8235-650 should be mechanically mounted according to the equipment arrangement and connected to the appropriate control and feedback system.
Mechanical alignment is particularly important for an actuator because excessive linkage resistance or incorrect travel can affect positioning accuracy.
Recommended checks include:
If the actuator fails to reach the commanded position, check the control signal, power supply, feedback circuit, mechanical linkage, and actuator mounting before replacing the unit.
| Model / Component | Type | Primary Function | Application |
|---|---|---|---|
| Woodward 8235-650 | Actuator | Mechanical actuation | Turbine / engine control |
| Woodward 8200-226 | Servo Position Controller | Servo position regulation | Turbine / engine control |
| Woodward 8200-188 | Digital Valve Positioner | Valve positioning | Industrial control |
| Woodward 8200-182 | Turbine Driver Module | Turbine control | Turbomachinery |
| Woodward 8200-1311 | Digital Governor Module | Governor control | Engine / turbine systems |
| Woodward 8200-1508 | Digital Control Module | Digital control | Industrial control |
For replacement applications, verify the actuator model, mechanical interface, control-signal requirements, travel requirements, feedback arrangement, and complete Woodward system configuration.
The 8235-650 is an actuator used to convert a control-system command into mechanical movement for turbine, engine, and other industrial control applications.
Depending on the specific installation, an actuator of this type can be mechanically connected to a control valve, governing mechanism, fuel-control mechanism, or other regulating linkage.
It can form part of a servo-control loop in which a controller generates the position command and the actuator produces the corresponding mechanical movement. Exact compatibility must be confirmed for the particular system configuration.
Check the complete model number, mechanical mounting, linkage arrangement, required travel, control interface, power requirements, feedback configuration, and compatibility with the associated Woodward controller.