PSM’s Sequential Fuel Injection (SFI) system is engineered to meet the rising demand for greater operational flexibility. Designed as an enhancement for gas turbines equipped with LEC-III™, LEC NextGen, and DLN-1 combustion systems using IBH (Inlet Bleed Heat), SFI unlocks deeper turndown—down to 35% load—while maintaining emissions compliance. That’s a 15% improvement over IBH-only systems.
Dual Combustors. Smarter Performance.
SFI is built around a series arrangement of two combustors. A smaller second combustor is placed downstream of the primary liner and injects fuel directly into the aft end of the combustion zone. This design enables extended turndown while keeping NOx and CO emissions within permit limits—without sacrificing heat rate or efficiency.
The Ideal Partner for Hydrogen and Flexible Fuels
SFI works seamlessly with additional PSM technologies like ExB (Exhaust Bleed) and AutoTune, expanding the operability window and enabling reliable performance in hydrogen blends and alternate fuels. It helps plant operators meet future fuel flexibility demands today.
Ready to Learn More?
Explore the brochure for a detailed breakdown of upgrade options.
Sequential Fuel Injection Flyer 
