Product Details
The Woodward 9907-167, also cataloged as the 9907-167 Digital Governor, operates as a dedicated hardware component for 32-bit microprocessor-based steam turbine control within industrial governing systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 9907-167 |
| Brand | Woodward |
| Origin | USA |
| Weight | < 10 lbs |
| Dimensions | 14 x 11 x 4 inches |
| Operating Temp | -25 to 65 deg C (Standard); -25 to 55 deg C (w/ NEMA 4X) |
| Power Consumption | 18 - 32 VDC |
| Processor | 32-bit microprocessor |
| Actuator Outputs | 2 |
| Relay Outputs | 8 |
| Programmable Current Outputs | 6 |
| Shock Protection | US MIL-STD-810C, method 516.2- 1, procedure 1B |
Actuator Loop Feedback Response
The 9907-167 maintains precise turbine valve positioning via two dedicated actuator outputs. These outputs provide the necessary control signals to modulate inlet steam valves, utilizing high-speed feedback loops to ensure stable governor response. The system resolution is managed via a 32-bit architecture, which minimizes latency in actuator command execution. Periodic calibration of the actuator loop feedback is required to maintain steam turbine stability, particularly when operating under variable extraction or admission pressure conditions.
Frequently Asked Questions
Q: Can the 9907-167 support field configuration changes?
A: Yes, the unit is equipped with program upload and download capability via the operator interface, allowing for site-specific parameter adjustments to the governor control logic.
Q: How does the NEMA 4X enclosure affect thermal performance?
A: The addition of a NEMA 4X protective casing limits the maximum allowable ambient operating temperature from 65 deg C down to 55 deg C. Ensure adequate ventilation or auxiliary cooling is provided if the cabinet temperature approaches this limit.
Field Installation Guidelines
- Mounting: Ensure the enclosure is securely fastened within a control panel. If utilizing the NEMA 4X casing, confirm all seals are intact to maintain the ingress protection rating.
- Grounding: Verify the control chassis is connected to a common earth ground to mitigate electromagnetic interference and ensure stable 32-bit processor operation.
- Wiring: Route signal lines (analog/actuator) separately from high-voltage AC power cables to prevent induced noise in the current output loops.
- Interface: Utilize the 30-key keypad and 2-row display for initial commissioning and verification of I/O status prior to putting the turbine online.
- Validation: Before startup, perform a cold-loop check of the 8 relay outputs and 6 current outputs to verify continuity and signal integrity to the field devices.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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