Pratt & Whitney Power Systems (PWPS) has designed 1st-, 2nd-, and 3rd-stage nozzles for the hot gas path of the Frame 7FA+e gas turbine. The designs incorporate Pratt & Whitney's extensive high-temperature experience to provide improved total life-cycle costs.
Pratt & Whitney has improved upon the OEM offering by designing parts that minimize oxidation, creep and metal temperatures, ultimately extending part life and reducing operating and future repair costs.
Product Facts
Pratt & Whitney 7FA+e 1st-Stage Nozzle Design Advantages
- PWA 1434™ alloy (same cobalt alloy as OEM) maintains repair weldability
- Parallel chordal hinge seal provides better sealing between vane ID and support ring
- Full gas-path UDC-TBC (ultra-dense cracked thermal-barrier coating) system provides:
- Improved oxidation life and reduces airfoil metal temperatures
- Improved airfoil to sidewall fillets improve cracking resistance
- Improved sidewall cooling reduces oxidation metal loss
Pratt & Whitney 7FA+e 2nd-Stage Nozzle Design Advantages
- PWA 1498™ alloy (CM939 alloy) improves creep and oxidation life
- PWA 1498™ maintains ability to repair weld
- Full gas-path UDC-TBC system provides reduced airfoil metal temperatures
- Fatigue debit of external aluminide coating eliminated
- Diaphragm material changed to 310SS for improved oxidation over Ni-Resist; more operator friendly during repair weld schemes
Pratt & Whitney 7FA+e 3rd-Stage Nozzle Design Advantages
- GTD-222 alloy (same as OEM)
- Uncoated design (same as OEM)
- Removal not required for 3 HGPI minimum
- Diaphragm material changed to 310SS for improved oxidation over Ni-Resist; more operator friendly during repair weld schemes
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Customer Contact
Power Systems Customer Support
United States: 866-769-3725 (866-POWER-ALL)
Outside USA: 1-860-565-0140Marketing/Sales Contact
Lucia Maffucci
860-565-3051
lucia.maffucci@pw.utc.com
Media Questions
Matthew Bates
86-557-3595
matthew.bates@pw.utc.com
Pratt & Whitney. It’s in our power.™