Pratt & Whitney Power Systems (PWPS) offers 1st-stage turbine buckets for use in Frame 7B through 7EA gas turbines. The Pratt & Whitney buckets offer enhanced durability and extended part life at a competitive price.
Pratt & Whitney is so confident in the superior attributes of its parts, it offers an unparalleled guarantee for the life-cycle of the part. The PWPS 7EA bucket is made of PWA 1432™ equiaxed, a nickel-base superalloy that greatly enhances the life of the part.
Parts are coated with PWA 264™ that provides superior oxidation resistance and enhanced temperature capability through improvements in normal mechanical fatigue life. High-temperature performance up to 2055°F is achieved with the application of a world-class P&W low-pressure plasma spray (LPPS) metallic-bond coating and thermal barrier coating (TBC).
Platform Cracking Solution
Platform cracking is a phenomenon commonly experienced in 7EA gas turbines operated in peaking cycle mode.
Cracks start at the edge of the platform and, in extreme cases, propagate to the fillet. Many operators report cracks after 300 to 500 starts and have replaced otherwise reparable 1st-stage buckets due solely to platform cracks. Other manufacturers have developed solutions that may merely delay cracking. In addition, many of these solutions increase the cooling flow, ultimately degrading engine performance.
The Pratt & Whitney design, based on rigorous finite element analysis, eliminates the cracking problem without changes to the cooling flow. Pratt & Whitney also offers the platform-cracking solution as a retrofit for existing parts.
Product Facts
(Operation in accordance with GER-3620)
Maximum firing temp. 2055°F
Fuel: Natural gas
Operation mode: Base or cyclic load
24,000 hours/1,200 starts
Repairability guarantee
48,000 hours/2,400 starts
Repairability guarantee
72,000 hours/3,600 starts
Technical review
Subject to PWPS standard terms and conditions.
Customer Contact
Power Systems Customer Support
United States: 866-769-3725 (866-POWER-ALL)
Outside USA: 1-860-565-0140
Marketing/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.™