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WOODWARD 9907-135 | Direct Replacement for GS3 LQ25 Valve Systems
WOODWARD 9907-135 | Direct Replacement for GS3 LQ25 Valve Systems - Image 2
WOODWARD 9907-135 | Direct Replacement for GS3 LQ25 Valve Systems - Image 3

WOODWARD 9907-135 | Direct Replacement for GS3 LQ25 Valve Systems

Original price was: $9,981.00.Current price is: $4,567.00.

Product Core Brief

  • Model: 9907-135
  • Brand: Woodward
  • Series: GS3/LQ Driver Module
  • Core Function: Converts 4–20 mA demand signals into actuator drive current for fuel valve positioning
  • Type: Fuel Valve Driver Module (Actuator Interface)
  • Key Specs: 10–32 VDC supply; 24 A maximum output; 4–20 mA control input; ≤2 ms response
  • Condition: New Original (New Surplus) — verify with seller
  • Compatibility: GS3, LQ3, LQ25, LQ25T, LQ bypass series valves; GE LM1600/LM2500/LM6000 turbines
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Category: SKU: 9907-135 WOODWARD
  • Email:sales@sxrunsheng.cn
  • Phone:+86 15340667322
  • Whatsapp：+86 15340667322

    • Description

    Product Introduction

    The WOODWARD 9907-135 is a GS3/LQ driver module for turbine fuel valve control. It takes a 4–20 mA command signal from the governor and drives the actuator to position liquid or gaseous fuel valves.

    Field deployments on LM-series gas turbines show this module handles the current loop directly — no separate amplifier needed. The 24 A output capacity drives GS3 and LQ25 actuators without an intermediate stage. Response time lands under 2 ms, which keeps fuel metering tight during load swings .

    WOODWARD 9907-135 | Direct Replacement for GS3 LQ25 Valve Systems

    Installation & Configuration Guide

    Phase 1 — Pre-Installation (est. 10 min)
    De-energize the control cabinet and verify zero voltage at the module terminals with a Fluke 115 multimeter. Photograph all wiring connections and terminal positions. Record the 4–20 mA signal source routing and feedback resolver wiring. ❗ Do not reverse power polarity — the module has no reverse-polarity protection .

    Phase 2 — Removal (est. 5 min)
    Label every wire: power, 4–20 mA demand signal, actuator output, and resolver feedback. Release mounting screws and pull the module from the panel. Inspect terminal blocks for corrosion or heat damage.

    Phase 3 — Installation (est. 10 min)
    ESD wrist strap on, grounded to cabinet. Verify the replacement is 9907-135. Mount the module and secure screws. Reconnect wiring per photos. Use shielded twisted-pair cable for the 4–20 mA signal — terminate shield at cabinet ground only . Verify actuator feedback wiring polarity before power-up.

    Phase 4 — Power-On & Testing (est. 15 min)
    Apply 24 VDC supply. Verify STATUS LED behavior. Inject a 12 mA signal (50% demand) and observe actuator movement. Check feedback resolver tracking. Run a step response from 4 to 20 mA and confirm actuator reaches full position within specified response time. Log the swap with date and turbine serial number.

    Troubleshooting Quick-Reference:

    • No actuator movement → check 24 VDC supply, 4–20 mA signal presence, actuator coil continuity
    • Erratic positioning → verify resolver feedback wiring and shield grounding
    • ❗ Overcurrent trip → actuator coil short or excessive mechanical load; measure coil resistance
    • Communication fault → check RS-485 wiring if remote monitoring used

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