7B/E/EA Gas Turbine Frame Upgrades

PSM delivers proven upgrade solutions for 7B, 7E, and 7EA gas turbine frames that increase power output, enhance durability, and extend operational life. With decades of hands-on engineering and field experience, PSM’s tailored upgrades help operators meet today’s energy demands while maintaining emissions compliance.

Comprehensive Upgrade Solutions

Since 1999, PSM has supplied hot gas path buckets and shrouds for 7B, 7E, and 7EA frames. In 2014, we expanded our capabilities to include full gas turbine nozzle ranges, compressor hardware, and advanced component upgrades. All solutions are backed by advanced modeling, metallurgical testing, and system-level diagnostics.

Our 7E and 7EA components are compatible with the latest 2055F firing temperature engines, such as GE Model 7121, and are backward-compatible to 7B units. Typical hot gas path service intervals of 24,000 FFH or 1200 FS can be extended to 32,000 FFH with expert consultation.

Upgrade Benefits for 7B/E/EA
Frames

• Enhanced Performance: Upgrades improve turbine output, operating efficiency, and responsiveness.
• Increased Efficiency: Reduces fuel consumption and operating costs through improved combustion dynamics and cooling schemes.
• Improved Reliability: Addresses OEM limitations by integrating new sealing, coating, and alloy technologies.
• Advanced Technology Integration: Enables compatibility with digital monitoring systems, modern materials, and smart controls.
• Environmental Compliance: Helps meet emissions targets, including reduced NOx and CO.
• Cost Savings: Lowers lifecycle maintenance costs through fewer part replacements and extended run-times.

It's important to note that the specific benefits of upgrading the 7B/E/EA gas turbine frames may vary depending on the scope of the upgrade, the condition of the existing equipment, and the goals and requirements of the power generation facility.

Component Design Improvements

1st Stage Nozzle

• Equivalent to OEM in form, fit, and function
• Optional NiCoCrAlY coating and TBC (thermal barrier coating) options

1st Stage Buckets

• 12 radial stem drill holes for advanced airfoil cooling

2nd Stage Nozzle

• OEM-equivalent design

2nd Stage Buckets

• Scalloped tip shroud for better creep resistance
• Increased tip shroud contact surface to mitigate shingling
• Compatible with shrouded or non-shrouded block configurations

3rd Stage Nozzle

• OEM-equivalent nozzle design

3rd Stage Buckets

• Enhanced bucket tip shroud to reduce wear and extend part life

Additional Upgrade Solutions

LEC III™ & LEC NextGen

     •  Field-proven emissions solutions with sub-5ppm NOx (LEC III™) and <9ppm NOx (LEC NextGen)
     •  Compatible with legacy combustion systems including GE 6581B, 7121EA, and 9171E models
     •  100 global installations and growing
     •  Maintains emissions compliance while expanding turndown range