Description
The Woodward 8404-2017 is an electronic position controller and valve actuator assembly equipped with an integrated torque motor. It is designed for precise fuel or steam flow regulation in industrial turbine and engine management applications.
Commercial and Logistics Status
| Parameter | Value |
| Condition | New Surplus / Factory Refurbished (Verify specific unit availability upon inquiry) |
| Availability | Subject to current inventory status |
| Standard Lead Time | 3 to 5 business days for domestic shipments; international freight times vary |
| Warranty | 12 months standard replacement warranty |
| Pricing Note | Price subject to market conditions; contact us for a firm quote |
Technical Specifications
| Parameter | Value |
| Manufacturer | Woodward |
| Part Number / Catalog ID | 8404-2017 |
| Device Type | Position Controller / Valve Actuator with Torque Motor |
| Operating Voltage | 10 to 32 V DC |
| Control Signal Input | Analog position command (system-dependent, verify configuration) |
| Actuation Mechanism | Internal torque motor linkage for proportional positioning |
| Operating Temperature | −40 to +85°C (standard industrial engine/turbine envelope) |
| Mounting Type | Direct valve or bracket mount (verify mechanical interface drawing) |
| Enclosure Protection | Industrial ruggedized housing for heavy-duty operational environments |
Engineering and Field Integration Notes
When installing or replacing the 8404-2017 actuator assembly on gas turbines, steam valves, or reciprocating engines, strict adherence to mechanical alignment and calibration standards is required.
Integration Guidelines
- Linkage Calibration: Ensure zero backlash and precise mechanical alignment between the actuator output shaft and the valve stem to prevent hunting or positioning error alarms.
- Power Supply Ripple: Maintain a stable 10 to 32 V DC power source with minimal electrical ripple. Excessive voltage noise can cause instability in the internal torque motor positioning circuit.
- Feedback Loop Verification: Calibrate the internal position feedback sensor (LVDT or potentiometer, depending on the exact sub-variant) using the manufacturer-recommended service software before initial firing or hot commissioning.
Frequently Asked Questions
Q: Is the Woodward 8404-2017 safe for hazardous locations?
Y Certification depends on the specific product option and build variant. Always check the physical data label on the unit housing for exact ATEX, CSA, or UL hazardous area classifications before installing it in explosive atmospheres.
Q: What diagnostic checks should be performed if the actuator fails to respond to input commands?
A: Verify that the 10 to 32 V DC operating power is present at the terminal block, check the integrity of the command signal wiring, and inspect the internal error status via the controller’s service port or diagnostic LEDs.
