• Part Number: 9907-135 | Model Name: GS3/LQ Driver | Brand: Woodward Governor
• Applicable Servo Valves: LQ3, LQ25, LQ25T, LQ series bypass proportional fuel valves
• Main Power Supply: Wide DC range 10–32VDC, nominal 24VDC auxiliary power
• Control Command Input: Standard 4–20mA analog setpoint signal from speed governor
• Max Drive Output Current: 24A high-current proportional bipolar output for large-flow fuel actuators
• Position Feedback Interface: Resolver signal input for real-time valve position closed-loop correction
• Terminal Connection: Multi-group screw clamp terminal blocks for power, command, feedback and fault signal wiring
• Housing Structure: Industrial aluminum heat dissipation shell, built-in cooling fin for long-time high-load operation
• PCB Protection: Full conformal coating, anti-dust, moisture and corrosive gas for power plant cabinet environments
• Operating Temperature: -40°C ~ +85°C | Storage Temperature: -40°C ~ +85°C
• Mounting Method: Wall surface mounting via fixed brackets, compact cabinet installation layout
• Net Weight: Approx. 1.2kg | Dimension: 215 × 162 × 68mm
• Certifications: CE, UL industrial EMC anti-interference, power generation safety standard compliance
• Product Status: Discontinued original OEM spare part, only new surplus & refurbished replacement available

• High-precision proportional valve drive, convert 4–20mA speed control signal into linear current output to accurately adjust fuel valve stroke and stabilize unit speed
• Resolver position closed-loop feedback, real-time collect actual valve position data to eliminate control deviation and improve regulation linearity
• Built-in multi-stage overcurrent, overvoltage and overheating protection circuit, automatically lock output and trigger fault alarm when abnormal conditions occur
• Independent fault relay output contact, remote upload valve drive failure, power loss and feedback loss signals to main control DCS/SCADA system
• High-power drive capability, support large-caliber LQ series fuel valves for medium and large gas turbine prime mover fuel flow regulation
• Multi-layer surge suppression and signal isolation circuit, resist strong electromagnetic interference from turbine high-voltage ignition and excitation cabinets
• Plug-and-play matching with Woodward SCC-C, 2301A, 2301D speed controllers, no extra signal conversion module required
• Complete self-diagnosis function, detect valve coil open/short circuit, resolver disconnection and power supply undervoltage faults in real time
• Aluminum heat dissipation shell design, excellent heat dissipation performance to avoid thermal drift under long-term continuous load operation

• Combined Cycle & Thermal Power Plant: Gas turbine fuel control cabinet GS3/LQ servo valve drive core unit
• Oil & Gas Industry: Offshore platform, gas field compressor gas engine fuel flow regulation equipment
• Industrial Cogeneration Station: Large gas/diesel reciprocating generator set speed control system spare part
• Marine Power System: Ship main engine and auxiliary generator fuel valve drive control module
• Equipment Retrofit & Maintenance: Direct replacement driver for aging Woodward LQ fuel valve control systems

Product Picture