Key benefits

Efficiency adapted to your plant

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Proven platform – advanced materials

Both advanced ultra-supercritical steam turbine product families combine GE’s proven and fully modular design philosophy with the results of more than a decade of material and design research on the 700°C steam technology, which ensures high availability and reliability.

GE’s extensive portfolio of modern last stages ranges from 27” to 50” and allows configuration of the STF-D1250 and STF-D2250 with exhaust areas between 9m2 and a staggering 72m2, all offering GE’s proven nub-and-sleeve damping system with superior damping behavior at any flow condition.

GE’s extensive know-how base and experience, combined with rigorously standardized engineering, design and manufacturing processes allow extensive customiz for any application without compromising on quality, lead time, or operating reliability.

Key features

STF-D1250 and STF-D2250 A USC reheat platforms

Two high-performance turbine platforms designed to take steam power generation to new efficiency levels in both 50 and 60 Hz grids without compromising on operational flexibility.

  • Robust and versatile turbine architecture built on GE’s proven USC platform proven over more than 20 years. Material and design adaptations are limited to the high and medium pressure turbines, which ensures the high dependability and availability levels for which GE turbines are renowned.
  • Outstanding configuration flexibility including different HP and IP module sizes, up to three double flow LP modules, as well as internally or externally controlled steam extractions for process steam supply
  • Overload capacity at constant boiler pressure and reliable trip-free emergency de-loading thanks to optional overload valves and start-up valve (TAL) configurations
  • Increased turbine efficiency, cycling capacity, and back pressure capability with GE’s unique shrink ring HP module design and GE’s latest nub and sleeve/free tip rear stages with low stress root design
  • Time-saving installation thanks to fully assembled HP and IP modules, pre-assembled LP shipping modules, skid mounted auxiliaries, and expansion sleeve type couplings that facilitate alignment and ensure smooth operation
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Product specifications

STF-D1250 &STF-D2250 products specifications

Specifications shown are for 50 Hz and 60 Hz.

  STF-D1250 STF-D2250
Main Steam 330bar (4786psig) 330bar (4786psig)
Main Steam / Reheat Steam Temperature 650°C / 670°C (1202F / 1238F) 620°C / 630°C / 630°C (1148F / 1166F / 1166F)
Output 400 - 1200MW 600 - 1200MW
Efficiency ≥ 54% ≥ 53%
Maximum Backpressure ≤ 700 mbar (20.7 in. Hg) ≤ 700 mbar (20.7 in. Hg)
Control Concept Sliding pressure mode, Hybrid mode with or without overload valve Sliding pressure mode, Hybrid mode with or without overload valve
Further reading

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