Key benefits

Efficiency and flexibility adapted to your plant


High efficiency

The STF-A650 and STF-D650 reheat steam turbines offer outstanding competitive performance for high parameter renewable steam power and combined cycle applications, using GE’s latest generation of 3D reaction blading, advanced rear stages, and high-performance gland and inter-stage sealing technology.


Configuration flexibility

The fully modular architecture allows configuring the steam turbines for even the most demanding applications. Options include multiple controlled extractions, and condensing, district heating or back pressure type exhausts. Modules from other product families may be used as required.


Detailed for integration

STF-A650 and STF-D650 steam turbine modules are largely factory assembled and pre-tested to save installation time. An optional side exhaust configuration is optimized for low level arrangement and outdoor installation, which helps reducing total installed cost.


Key features

STF-A650 and STF-D650 reheat steam platform

A versatile platform optimized for high parameter concentrated solar power applications as well as for advanced combined cycle steam tails and high efficiency industrial co-generation application in either 50 or 60 Hz grids.

  • Robust and versatile turbines with a successful track record spanning more than 30 years.
  • Outstanding configuration flexibility including internally or externally controlled steam extractions and axial, lateral, or backpressure exhausts.
  • A design for more than 10,000 starts and optional stress controller and start-up valve (TAL) valve for rapid starts and transients make the STF-A650 and STF-D650 reheat steam turbines a great choice for concentrated solar power and CCPP applications with a daily start/stop regime
  • Overload capacity at constant boiler pressure and reliable trip-free emergency de-loading thanks to optional overload valves
  • Lower transport cost and up to three months reduction of installation time thanks to the optional fully factory assembled configuration available for the STF-A650
  • 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
Product specifications

STF-A650 & STF-D650 product specifications

Specifications shown are for 50 Hz and 60 Hz.

  STF-A650 (MT) STF-D650
Main Steam 190 bar (2,750 psig) 190 bar (2,750 psig)
Main Steam / Reheat Steam Temperature 585 °C / 585 °C (1,085 °F / 1,085 °F) 585 °C / 585 °C (1,085 °F / 1,085 °F)
Output 100 - 300 MW 200 - 700 MW
Efficiency ≤ 48% ≤ 48%
Maximum Backpressure ≤ 700 mbar (20.7 in. Hg) ≤ 700 mbar (20.7 in. Hg)
Control Concept Sliding pressure mode, Fixed pressure mode, Hybrid mode with or without overload valve Sliding pressure mode, Fixed pressure mode, Hybrid mode with or without overload valve
Further reading

Learn More

Contact us

Want to learn more?