PSM’s GTOP packages combine hot gas path component upgrades, compressor aerodynamic improvements, and combustion system enhancements into a coordinated performance solution for GE7F, GE 7B/EA, and Siemens/MHI 501F gas turbines. GTOP supports three operating modes: Maintenance Mode for extended inspection intervals (up to 32,000+hours), Performance Mode for increased output (up to 7%) and improved heat rate(up to 3%), and Peak Mode for maximum output. Operators can switch between modes using PSM’s FlexSuite counters, adapting to seasonal demand, market conditions, or operational priorities. GTOP is compatible with multiple combustion systems, including PSM’s FlameSheet.
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Operational Flexibility
Unlock higher performance or extended maintenance intervals—without compromising reliability.
With GTOP, operators can choose between Maintenance Mode and Performance Mode, allowing you to adapt based on operational or seasonal demands:
- Maintenance Mode: Extend hot gas path inspection intervals up to 32,000 or even 40,000 hours.
- Performance Mode: Increase power output (up to 7%) and heat rate (up to 3%).
- Peak Mode: Maximum output for short-duration dispatch, available with upgraded hardware options.
- AutoTune Compatibility: Seamlessly switch between modes for optimal flexibility.
Optimized Combustion Parts
PSM’s DLN combustion systems have been upgraded for better emissions control and durability. New options offer NOx levels below 5ppm or 9ppm, depending on the selected system.
7B-EA Standard and Upgrade Options
Our structured GTOP packages include upgrades to combustion and hot gas path components, providing performance near or above OEM standards. Highlights include:
- Extended Component Life: Inspection intervals up to 32,000 hours in Maintenance Mode.
- FlexSuite™ Counters: Easily switch between maintenance and performance operation.
- High Firing Capability: Optional upgraded hardware for peak output.
- S1 and S2 Bucket Upgrades: From OEM to PSM’s advanced alloys for improved durability and creep resistance.
7F Upgrade Packages
GTOP3.0
Installed during a standard HGP outage, this package enhances efficiency and emissions performance:
- Redesigned transition piece and flow sleeves for reduced pressure drop
- Improved cooling features and thermal barrier coatings
- ≤9ppm NOx with PSM AutoTune
- Drop-in compatibility with standard 7F hardware
GTOP3.1
Builds on GTOP3.0 with aerodynamic upgrades to the R0, S0, and S1 compressor stages:
- Improved inlet flow for better efficiency
- Components designed with proven PSM mechanical integrity
- Optional upgraded 1st & 2nd stage buckets for durability
Shared Benefits of GTOP3.0 & 3.1
- Hot gas path inspection intervals extended to 32,000 hours
- Enhanced performance without sacrificing lifecycle
- Flexible operation mode switching
GTOP4.1
GTOP 4.1 The latest evolution of PSM’s 7F upgrade package, GTOP 4.1 builds on the proven GTOP 3.1 platform with advanced cooling in the first turbine stages for improved component life and reduced lifecycle costs. Compatible with both 7F.03 and 7F.04 machines.
501F GTOP Offerings
Tailored packages for MHI and Siemens-based 501F units:
GTOP6
- R16 compressor blade with IGV control
- Robust 4th blade and ring segment
- Enhanced durability and reduced flow losses
GTOP7
- Modular vane design
- Advanced coatings and cooling for vanes and blades
GTOP8
- GTOP7-based solution optimized for MHI 501F turbines
The Ontelaunee 501F installation achieved 7% net plant output increase and 1.7% net plant heat rate improvement.
Want to learn more about Flamesheet options?
DOWNLOAD THE GTOP TECHNICAL Brochure (PDF)
