We engineer and manufactures aftermarket hot gas path components, combustion system retrofits, and compressor hardware for the GE 7B, 7E, and 7EA gas turbine fleet. All components are designed and manufactured at our Jupiter, Florida facility using proprietary alloys, coatings, and cooling configurations that meet or exceed OEM specifications. We have supplied 7B/7E/7EA parts and upgrades since 1999. Our component designs are compatible with the latest 2055F firing temperature engines (GE Model 7121) and backward-compatible to legacy 7B units. Over 100 global installations of LEC III low-emission combustion systems validate our 7EA engineering across diverse fleet configurations.
7EA Upgrade Capabilities and Compatibility
Our 7EA component portfolio covers the full hot gas path, combustion section, and compressor. Since 1999, we have supplied hot gas path buckets and shrouds for the 7B/7E/7EA platform. In 2014, we expanded to full-range gas turbine nozzles, compressor hardware, and advanced component upgrades. All PSM 7EA components are backed by advanced computational modeling, metallurgical testing, and system-level performance validation.
Key compatibility details:
- Compatible with GE 2055F firing temperature engines (Model 7121) and backward compatible to 7B units
- Standard hot gas path inspection intervals: 24,000 fired factored hours (FFH) or 1,200 factored starts (FS)
- Extended intervals available up to 32,000 FFH with PSM engineering consultation
- All components designed as form, fit, and function equivalents to OEM parts, with proprietary improvements to alloys, coatings, and cooling
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What 7EA Operators Gain with PSM
Extended Inspection Intervals:
Hot gas path intervals extended from 24,000 to 32,000 fired factored hours, reducing outage frequency, and lowering lifecycle maintenance costs.
Sub-5 ppm NOx Emissions:
LEC III combustion retrofit delivers sub-5 ppm NOx on natural gas, field-proven across 100+ global installations on 7B, 7E, 7EA, 6B, and 9E frames.
OEM-Independent Service Flexibility:
All PSM components are form, fit, and function compatible with OEM equipment. No OEM lock-in required. Full support available through PSM field service or your existing maintenance provider.
Component Design Improvements
1st Stage Nozzle
- Direct OEM equivalent in form, fit, and function
- Optional NiCoCrAlY overlay coating for oxidation resistance
- Optional thermal barrier coating (TBC) for enhanced thermal protection
- Advanced computational fluid dynamics (CFD) validated airfoil profiles
1st Stage Buckets
- 12 radial stem drill holes for improved airfoil cooling
- Advanced single-crystal or directionally solidified alloy options
- PSM-proprietary coating systems for oxidation and hot corrosion resistance
2nd Stage Nozzle
- OEM-equivalent design with PSM manufacturing quality controls
- Compatible with standard and extended interval inspection programs
2nd Stage Buckets
- Scalloped tip shroud design for improved creep resistance at operating temperature
- Increased tip shroud contact surface to mitigate shingling (shroud overlap distortion)
- Compatible with both shrouded and non-shrouded blockconfigurations
3rd Stage Nozzle
- OEM-equivalent nozzle design
- PSM quality-controlled casting and machining processes
Shrouds (Stage 1-3)
- Full set of Stage 1, Stage 2, and Stage 3 shroud segments
- Advanced thermal barrier coating and bondcoat systems
- Designed for extended intervals up to 32,000 FFH
Combustion Liners
- Aftermarket replacement liners for 7B, 7E, and 7EA combustion sections
- Compatible with standard DLN configurations and LEC III retrofit
Transition Pieces
- Replacement transition pieces for 7EA combustion systems
- Manufactured to OEM dimensional specifications with PSM coating and cooling improvements
Fuel Nozzles
- Replacement fuel nozzles for 7B, 7E, and 7EA gas turbines
- Compatible with natural gas and dual-fuel configurations
- Available as individual nozzles or complete sets
Base mounts and Compressor Hardwar
- R0-R3 compressor blade and stator upgrades
- Basemount components for the 7EA platform
- Designed to address known compressor reliability issues
LEC III™ and LEC NextGen Low-Emission Combustion for the 7EA
PSM's LEC III and LEC NextGen combustion systems are field-proven low-emission retrofits for the GE 7B, 7E, 7EA, 6B, and 9E platforms. These systems replace the existing combustion hardware with PSM's proprietary combustor design to achieve regulatory-compliant NOx and CO emissions without sacrificing operational flexibility.
LEC III™:
- Sub-5 ppm NOx on natural gas at baseload
- 100+ global installations across B/E-class fleet
- Compatible with legacy GE combustion systems including 6581B, 7121EA, and 9171E models
- Extended turndown range while maintaining emissions compliance
LEC NextGen:
- Sub-9 ppm NOx on natural gas
- Designed as a lower-cost entry point for operators who need emissions reduction without the full LEC III™ package
- Same form factor and installation footprint as LEC III™
Both systems are designed for installation during a standard combustion inspection outage. PSM provides complete project management including combustion dynamics monitoring, emissions tuning, and commissioning support.
Learn more about LEC III™.webp)
Get the Full 7EA Product and Solutions Guide
Download PSM's comprehensive guide to 7B/7E/7EA aftermarket parts, component upgrades, and combustion retrofits. Includes specifications, compatibility details, and performance data for every component in PSM's 7EA portfolio.
Download 7B-EA Products and Solutions Brochure (PDF)7EA Gas Turbine Upgrade FAQs
PSM manufactures a full range of aftermarket parts for the GE 7B, 7E, and 7EA gas turbine, including Stage 1, 2, and 3 buckets, nozzles, and shrouds, combustion liners, transition pieces, fuel nozzles, crossfire tubes, and flow sleeves. All components are engineered as direct replacements for OEM parts with proprietary design improvements for durability and extended service life.
LEC III (Low Emission Combustion III) is PSM's proprietary combustion retrofit for the 7EA platform. LEC III achieves NOx emissions below 5 ppm on natural gas without requiring water or steam injection, which eliminates water treatment costs and associated maintenance. The system is a direct replacement for the existing combustion hardware and installs during a standard combustion inspection outage.
The 7B, 7E, and 7EA are successive generations of the same GE E-class platform. The 7EA is the most common variant in current operation. While many hot gas path components share the same basic geometry across all three variants, there are differences in materials, cooling features, and dimensional tolerances between generations. PSM engineers components specific to each variant and can confirm exact part compatibility based on your unit's serial number and configuration.
Yes. PSM's 7EA hot gas path components are designed with upgraded alloys and improved cooling features that support extended inspection intervals compared to OEM baseline recommendations. The specific interval extension depends on operating conditions, fuel type, and the scope of PSM components installed. PSM's engineering team provides site-specific assessments to determine the achievable interval for each unit.
Yes. PSM's AutoTune system is compatible with the 7EA platform and provides automated combustion tuning that maintains emissions compliance and combustion dynamics stability across varying ambient conditions and fuel compositions. AutoTune is particularly valuable for 7EA units with LEC III combustion systems, where maintaining optimal combustion dynamics is critical for achieving and sustaining sub-5 ppm NOx performance.
LEC NextGen is the next generation of PSM's low-emission combustion technology, building on the proven LEC III platform. LEC NextGen is designed to deliver even lower emissions, extended hardware life, and broader fuel flexibility including hydrogen blending capability. Contact PSM engineering for availability and specifications on the LEC NextGen system for your 7EA fleet.
Related Products and Services:
Proprietary Technologies
FlameSheet™ Combustion System — Advanced lean premix combustion with hydrogen capability and single-digit NOx
LEC III™ / LEC NextGen — Ultra-low-emission combustor retrofit for B/E-class frames, sub-3 ppm NOx on natural gas
GTOP Performance Packages — Hot gas path optimization with extended inspection intervals up to 32,000+ hours
AutoTune — Automated combustion tuning for real-time emissions optimization across varying conditions
Sequential Fuel Injection (SFI) — Enhanced combustion dynamics and improved load flexibility
Auxiliary Upgrades — Increase the performance, flexibility, and environmental efficiency of your gas turbine plant
Services and Support
Field Services & Outage Management — On-site installation, outage support, and project management worldwide
Reconditioning & Repair — Component repair, advanced coatings, and reconditioning for hot gas path and combustion parts
Rotor Rebuild & Inspection — Rotor life assessment, disassembly, inspection, and rebuild services
Long-Term Service Agreements (LTSA) — Flexible multi-year parts and service coverage tailored to your fleet
Intelligent Data & Monitoring — Remote monitoring, diagnostics, and performance analytics
Ready to Evaluate 7EA Parts or a Combustion Retrofit?
Tell us your turbine model, operating hours, and what you are looking to solve. A PSM 7EA engineer will review your configuration and recommend the right components or upgrade package for your next outage.
Request a 7EA Assessment