Description
Woodward GS16 (9908‑1501) Gas Fuel Metering Valve
Product Overview
9908‑1501 GS16‑DR is Woodward high‑performance electrically‑actuated gas fuel metering valve for industrial gas turbines. It integrates mechanical metering body, torque motor actuator and on‑board electronic driver with dual resolver position feedback. This unit precisely modulates gaseous fuel flow to turbine combustors, implements accurate fuel regulation and reliable safety shut‑off. The GS16‑DR variant accepts 125 VDC power supply, dual‑redundant resolver feedback, designed for heavy‑duty power‑generation gas turbine applications. Original production is phasing‑out; Woodward will discontinue standard production by Sep‑30‑2027, spare & overhaul support available until 2037Woodward.
Woodward GS16 9908-1501
Key Specifications
| Item | Parameter |
|---|---|
| Part Number | 9908‑1501 (GS16‑DR) |
| Manufacturer | Woodward |
| Product Type | Gas Fuel Metering Control Valve |
| Nominal Size | 1.5‑inch port, ANSI flange connection |
| Power Supply | 125 VDC (GS16‑DR version) |
| Max Inlet Gas Pressure | 750 psig (51.7 bar) |
| Max Fuel Flow | 30 000 lb/hr (13 607 kg/h) |
| Response Time | ＜100 ms full‑stroke typical |
| Shut‑off Rating | ANSI B16.104 Class III |
| Fuel Gas Temperature | ‑40 °C ~ +93 °C (‑40 °F ~ +200 °F)Woodward |
| Ambient Operating Temp | ‑40 °C ~ +93 °C |
| Position Feedback | Dual redundant resolver (DR version) |
| Control Signal | 4‑20 mA analog demand; PWM digital demand; 4‑20 mA valve‑position outputWoodward |
| Safety Certification | SIL‑2 capable, ATEX / IECEx Zone 1 certified |
| Wetted Materials | All stainless steel construction |
| Weight | Approx. 12.7 kg |
| Status | Legacy product, end‑of‑sale Sep‑2027, spare‑part & overhaul availableWoodward |
Main Applications
- Industrial & aeroderivative gas turbine fuel control (10‑50 MW power range)
- Combined‑cycle power‑generation gas turbine units
- Dry‑Low‑NOx (DLN) combustion systems for low‑emission operation
- Mechanical‑drive gas turbines for compressor & pump packages
- Oil‑&‑gas captive power plant turbine fuel regulation
- Retrofit, spare‑part replacement and overhaul for existing Woodward turbine control systems
Woodward GS16 9908-1501
Related Series Models
- 9908‑1501 GS16‑DR 1.5″, 125 VDC, dual resolver feedback
- standard 24 VDC single resolver variant
- GS6 Small‑capacity gas metering valve for lower‑power turbines
- GS40 / GS50 New‑generation drop‑in replacement series for legacy valvesWoodward
Core Features
- Patented self‑cleaning shear‑type metering: Spherical metering element performs shear motion during adjustment, removing condensate and debris to prevent port fouling, stable performance for contaminated fuel‑gas supplyWoodward.
- On‑board integrated electronic driver: Built‑in position controller eliminates external driver cabinet; accepts 4‑20 mA / PWM demand signals, outputs 4‑20 mA valve‑position feedback to turbine controller.
- : Two independent resolvers measure valve‑spool position; redundancy improves safety integrity for SIL‑2 turbine fuel loops.
- High‑speed dynamic response: Fast stroke response supports turbine load‑change, startup and trip transient conditions, maintains stable combustion.
- Reliable safety shut‑off: Complies with ANSI Class III shut‑off performance; supports discrete emergency shutdown input for turbine safety trips.
- Robust heavy‑duty mechanical construction: Stainless‑steel wetted parts, suitable for hazardous classified zone‑1 environment; single main moving component reduces wear points.
Main Functions
- Receive fuel‑demand set‑point signal from turbine control system, accurately position spherical metering element to modulate gas fuel flow into gas‑turbine combustor.
- Real‑time valve‑position measurement via dual resolvers; close‑loop position control by on‑board driver to guarantee flow accuracy.
- Output 4‑20 mA analog position signal to external turbine controller for valve‑status monitoring and diagnostics.
- Execute positive safety shut‑off upon emergency‑shutdown command, cut fuel supply for turbine trip protection.
- Continuously detect internal driver faults, resolver mismatch and valve anomaly; provide discrete fault alarm output to host control system.
- Support DLN multi‑valve coordinated fuel‑flow control for low‑emission gas‑turbine combustion processes.
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