Woodward 9907-363

Digital guide

Product Introduction: The 9907-363 is an LQ25 series electric liquid fuel metering valve for industrial and aero-derivative gas turbines in the 6,000 kW to 42,000 kW output range. It adopts a fully integrated all-electric design combining a brushless DC motor, rotary plate metering valve, and non-contact resolver-based position sensor, achieving precise closed-loop position control through a matched electronic driver. The LQ25 series provides self-cleaning shear-type metering, a high flow turn-down ratio, accurate flow control, and excellent corrosion resistance, serving as the core executive element of gas turbine liquid fuel electronic control systems.

WhatApp

WeChat

Detailed content

Technical Specifications:

Product Type: Electrically driven liquid fuel metering valve
Control Mode: Digital servo closed-loop control (with matched LQ/LO driver)
Output Form: Rotary plate angular position
Input Command Signal: 4 to 20 mA
Position Feedback Output: 4 to 20 mA
Driver Supply: 18 to 32 VDC
Operating Media: Diesel, JP series fuels, kerosene, gasoline, naphtha, gas turbine fuel oil, and other compliant distillates
Duty: Continuous modulation

Functional Features:

Fully integrated all-electric design — brushless DC motor, metering valve, and position sensor integrated in one body, no gear backlash
Self-cleaning shear-type metering via rotary plate, strong anti-pollution capability
High flow turn-down ratio exceeding 100:1
Flow accuracy of ±5% of nominal flow point or ±0.5% of maximum rated flow (whichever is greater)
Non-contact position sensing using a single- or three-speed resolver — no mechanical wear
Built-in differential pressure regulator: single-stage spring-loaded piston diaphragm type
Corrosion-resistant materials in all fuel-wetted parts
Optional features within the LQ25 family: pressurizing valve (PIV), integral high-speed shutoff valve (SOV), integration with DVP driver

Application Scenarios: Liquid fuel metering for industrial gas turbines; fuel control for aero-derivative gas turbines; fuel regulation systems for power-generation gas turbines; fuel control for mechanical-drive gas turbines; marine gas turbine liquid fuel systems; fuel metering for combined heat and power (CHP) units.

Performance Parameters:

Flow Range: 80 to 26,000 lb/h (36 to 11,794 kg/h) — dependent on port size: 0.1 in² port for 4,000 to 8,000 lb/h (1,814 to 3,629 kg/h); 0.2 in² port for 8,000 to 18,000 lb/h (3,629 to 8,165 kg/h); 0.3 in² port for 18,000 to 26,000 lb/h (8,165 to 11,794 kg/h)
Minimum Metered Flow: 80 lb/h (36 kg/h) at specific gravity 0.77
Maximum Fuel Inlet Pressure: 1,200 psig (8,274 kPa)
Maximum Fuel Bypass Pressure: 100 psig (690 kPa)
Regulated Differential Pressure: 50 psid (345 kPa) nominal
Full-Stroke Slew Rate: less than 0.100 s
Valve Shut-off Slew Rate: less than 50 ms
Motor Speed: 35 rad/s (typ.)
Metering Leakage: less than 80 lb/h @ 600 psig
Operating Temperature: -28°C to +103°C (-18°F to +217°F)
Storage Temperature: -40°C to +103°C (-40°F to +217°F)
Protection Rating: IP66

Material Composition:

Valve Body: High-strength aluminum alloy (standard) or stainless steel (marine environment)
Metering Plate: Corrosion-resistant hardened stainless steel, precision EDM-machined
Metering Sleeve: Integrated with motor rotor, corrosion-resistant material
Motor Housing: Aluminum alloy with cooling fins
Motor Rotor: Rare-earth permanent magnet material
Position Sensor: Single- or three-speed resolver
Differential Pressure Regulator