WOODWARD 9907‑135 GS3/LQ VALVE DRIVER MODULE
Applications: Gas‑steam combined‑cycle power plants, petrochemical compressors, heavy‑duty reciprocating engines, turbine governing spare parts replacement and system retrofitting
Product Overview
WOODWARD 9907‑135 GS3/LQ Valve Driver Module is a high‑power digital servo drive designed for LQ‑series brushless electro‑hydraulic actuators, widely deployed in turbine governing and prime‑mover control loops. The module accepts 4‑20 mA position command signals from host controllers and implements closed‑loop position regulation via resolver feedback, delivering high output current to precisely drive fuel valves and turbine governing valves.
As a critical field spare part for power generation and petro‑chemical sites, the 9907‑135 supports remote trip commands, fault diagnostics and status alarm outputs. It can be used for new‑build system integration as well as on‑site retrofitting and upgrade replacement of ageing valve drive units for gas turbines, steam turbines and large reciprocating units.
Main Technical Specifications
| Part Number | 9907‑135 |
| Product Name | GS3/LQ Valve Driver Module |
| Supply Voltage | 10‑32 VDC |
| Max Output Current | 24 A |
| Command Signal | 4‑20 mA analog input |
| Feedback Interface | Resolver position feedback |
| Built‑in Functions | Fault detection, remote shutdown, fault indicator output |
| Operating Temperature | ‑20℃ ~ +60℃ |
| Weight | Approx. 2.27 kg (5 LBS) |
| Compatible Actuators | LQ3, LQ25, LQ25T electro‑hydraulic actuators |
Key Advantages & Application Fields
- Advanced closed‑loop PID algorithm for accurate valve positioning and stable unit load regulation
- Resolver feedback provides excellent EMI resistance and vibration tolerance for harsh industrial environments
- Wide DC input range to accommodate on‑site voltage fluctuation
- Multi‑level fault detection: signal abnormality, feedback open/short circuit, over‑current and actuator faults
- Remote shutdown input supports safety interlock protection for turbine systems
- Rack‑mount design compliant with IEC 60068‑2‑6 industrial vibration standards
- Typical applications: gas turbine control, steam turbine governing, reciprocating engine control, compressor units
- Main industries: combined‑cycle power plants, petrochemical, oil & gas transmission, heavy‑duty energy equipment projects
FAQ
Q: Which actuators can 9907‑135 drive?
A: It is specifically designed for Woodward LQ3, LQ25, LQ25T electro‑hydraulic actuators. Non‑LQ actuators are not compatible and may cause control deviation or hardware damage.
Q: What control signal does the module accept?
A: Standard 4‑20 mA analog command signal. Resolver feedback realizes full closed‑loop position control for turbine valves.
Q: What is the DC operating voltage range?
A: Rated supply is 10‑32VDC. Avoid continuous over‑voltage operation to prevent internal component damage.
Q: Is hot‑swap allowed during operation?
A: Hot‑swapping is prohibited. Cut off power supply before installation or replacement. Live plug‑out may cause unit trip or permanent module failure.
Q: What faults can the module detect?
A: It detects analog signal out‑of‑range, resolver open/short circuit, actuator faults, output over‑current and internal hardware faults, and outputs fault status to host system.
Q: What are the installation notes?
A: Install inside IP54 rated control cabinet with adequate ventilation. Avoid mounting directly on turbine bodies to reduce continuous vibration impact on the GS3/LQ valve driver module.
Tags: Woodward 9907‑135, GS3/LQ Valve Driver Module, Woodward servo driver, turbine governing spare parts, LQ‑series electro‑hydraulic actuator
