Product Description
The LQ6 liquid fuel metering system from Woodward is designed for precise fuel delivery in mid-range industrial gas turbines. This unit integrates a rotary metering valve, bypass pressure regulator, and embedded driver electronics into a single compact assembly, reducing external components and simplifying system architecture.
Engineered for turbines in the 3 MW to 15 MW class, the LQ6 provides stable and responsive control of liquid fuel flow, supporting combustion efficiency and operational consistency across varying load conditions.
Core Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LQ6 |
| Product Type | Liquid Fuel Metering Valve System |
| Supported Turbine Output | 3 MW to 15 MW |
| Fuel Compatibility | Diesel, kerosene, and similar liquid fuels |
| Supply Voltage | 24 VDC |
| Operating Temperature Range | -40 °F to +200 °F (-40 °C to +93 °C) |
| Metering Principle | Rotary valve with integrated bypass regulation |
| Control Electronics | On-board driver (analog or digital versions) |
| Mounting Interface | SAE flange connections |
| Optional Configuration | Conduit entry driver variant |
System Design Characteristics
The LQ6 incorporates a rotary metering valve paired with a bypass regulator to maintain accurate fuel flow while stabilizing upstream pressure fluctuations. This dual-function design enhances control precision and ensures consistent combustion performance.
Integrated driver electronics eliminate the need for separate control modules, reducing installation complexity and improving system reliability. Both analog and digital control variants are available, allowing compatibility with a wide range of turbine control platforms.
The compact construction reduces footprint and simplifies mechanical integration, particularly in retrofit or space-constrained installations.
Application Scope
Typical use cases include:
- Industrial gas turbines in distributed power generation
- Mechanical drive turbines in oil and gas facilities
- Combined heat and power (CHP) installations
- Backup and peak-load power systems
This system is optimized for medium-capacity turbines and may not be suitable for microturbines or large-frame utility turbines.
Installation and Operational Considerations
Proper filtration of the liquid fuel supply is critical to maintain metering accuracy and prevent internal wear. Contaminants such as particulates or water can impact valve performance over time.
Routine inspection and calibration are recommended as part of scheduled maintenance to ensure consistent operation and long service life.
A stable 24 VDC power source is required for the integrated driver electronics, with appropriate signal interfacing to the turbine control system.
Frequently Asked Questions (FAQ)
Q: What control options are available for the LQ6 system? A: The unit can be supplied with either analog or digital on-board driver electronics, depending on system requirements.
Q: How does the bypass regulator improve performance? A: It stabilizes pressure across the metering valve, allowing more accurate and consistent fuel flow control.
Q: What type of fuel quality is required? A: Clean, filtered liquid fuel is essential. Poor fuel quality can affect metering accuracy and component lifespan.
