Woodward GS6 9908‑1534 Gas Fuel Metering Valve

Description

Woodward GS6 9908‑1534 Gas Fuel Metering Valve

Product Overview

9908‑1534 (GS6‑SR) is Woodward all‑electric gas fuel metering valve equipped with on‑board integrated electronic driver, designed for aeroderivative and industrial gas turbine fuel controlWoodward. This unit features 0.30‑inch metering port, single resolver position feedback, 24 VDC power supply and dual‑conduit housing. It delivers precise gas flow modulation for turbine combustion chambers, combining shear‑type self‑cleaning metering element, brushless torque motor and closed‑loop position control. The GS6 series is legacy product; Woodward final order cutoff date is Sep‑30‑2027, repair & overhaul support will be available until Sep‑30‑2037, GS40 series serves as recommended drop‑in replacementWoodward.

Woodward GS6 9908-1534

Key Specifications

Main Applications

• Aeroderivative and medium‑size industrial gas turbine fuel regulation
• Combined‑cycle power generation units, distributed energy power plants
• DLN (Dry Low‑NOx) combustion system fuel metering
• Mechanical‑drive gas turbines for compressor packages
• Oil & gas captive power generation turbine fuel control
• Spare‑part replacement and overhaul for existing Woodward turbine control systems

Related Series Models

• 9908‑1534 GS6‑SR 0.30″ port, single resolver, 24 VDC, dual‑conduit
• 9908‑1531 GS6‑SR 0.15″ port variant
• 9908‑15xx GS6‑DR Dual‑redundant resolver high‑safety version
• 9908‑1501 GS16‑DR Larger‑flow gas metering valve sibling model
• GS40 Series Modern drop‑in replacement for legacy GS6 valves

Woodward GS6 9908-1534

Core Features

1. Shear‑type self‑cleaning metering element: Spherical metering ball produces shear scrubbing motion during adjustment, removes condensate and particulate contaminants, prevents port fouling under poor‑quality fuel‑gas conditions.
2. On‑board integrated electronic driver: No external driver cabinet required; accepts industry‑standard 4‑20 mA demand signal and outputs 4‑20 mA position feedback to turbine controller, simplifies system layout.
3. Single‑resolver closed‑loop position control: Single high‑precision resolver tracks valve‑shaft position; built‑in position controller eliminates mechanical backlash and ensures accurate flow regulation.
4. Fast dynamic response: High‑torque brushless motor supports rapid stroke movement, adapts to turbine startup, large‑amplitude load change and emergency trip transient conditions.
5. All‑electric drive design: No hydraulic oil supply needed, reduces leakage risk and routine maintenance workload.
6. Hazardous‑area qualified enclosure: Explosion‑proof dual‑conduit housing suitable for Class I Division 1 / Zone 1 hazardous gas environment; comprehensive internal fault diagnostics report resolver anomaly, power failure and driver faults to host turbine control system.

Main Functions

1. Receive 4‑20 mA fuel‑demand command from gas‑turbine controller, drive internal torque motor to position spherical metering element and precisely modulate fuel‑gas flow to combustors.
2. Collect valve‑shaft position via resolver, run closed‑loop position algorithm inside on‑board driver to guarantee accurate valve positioning.
3. Output 4‑20 mA analog position feedback signal for host system valve‑status monitoring and combustion‑loop logic execution.
4. Execute positive safety shut‑off upon ESD emergency shutdown command, cut off fuel supply for turbine safety protection.
5. Detect internal faults including resolver signal loss, power supply anomaly and driver failure; assert discrete fault alarm output to turbine control system.
6. Cooperate with multi‑valve configuration to realize DLN low‑emission combustion fuel‑gas distribution control.