TX-6 three-casing steam turbine with four-flow exhaust up to 800 MW
TX-6 is a tandem steam turbine rated up to 800 MW with three casings, designed for supercritical steam conditions. A reverse-flow high- and intermediate-pressure (HIP) cylinder works together with two double-flow LP cylinders, giving a four-flow exhaust. The turbine is used in high-output combined-cycle plants and in coal- and gas-fired steam turbine units.
- Design
- reverse-flow HIP cylinder + two double-flow LP cylinders, three casings
- Output
- up to 800 MW
- Main steam pressure
- up to 251 bar(a) (up to 271 bar per the 2024 catalog)
- Main steam / reheat temperature
- up to 600 °C / 620 °C
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
For TX-6 the series page gives main steam pressure up to 251 bar(a) (3,640 psia), while the manufacturer's 2024 catalog gives up to 271 bar(a). Main steam temperature is up to 600 °C, reheat up to 620 °C. The turbine is built for 50 or 60 Hz. In the reverse-flow HIP cylinder the steam in the high- and intermediate-pressure sections flows in opposite directions, and the axial forces on the rotor are partly balanced. For a specific unit the parameters are clarified according to the technical specification.
LP exhaust can be directed downward or sideways, and this choice gives extra freedom in plant layout. High efficiency, at the level of the best in its class, is attributed by the manufacturer to an optimized flow path and improved seals. Supercritical steam conditions raise cycle efficiency compared with subcritical units. Start-up time is short and start-up modes are flexible, so the turbine also suits units that change load often.
The combined operating experience of the TX-6 fleet exceeds 2.5 million hours. Deliveries include the JERA Nishi-Nagoya power plant in Japan. Typical sites include the steam section of high-output combined-cycle plants, as well as conventional coal- and gas-fired steam turbine units of high output. In a combined-cycle plant the steam turbine runs on steam from the heat recovery boilers of the gas turbines, so it must tolerate load changes well together with them. The manufacturer determines the dimensions of the unit for each project separately. Between the two-casing TX-4 and the four-casing TX-8, this series occupies the middle of the range.
The manufacturer has built steam turbines since 1927. By December 2023 it had delivered 2,038 units with a total output of 217,652 MW. The turbines are built at plants in Yokohama (Japan) and Chennai (India). In North America the company ranks first among suppliers of steam turbine units from 200 MW, and the first delivery there took place in 1967. In this market the turbines are supplied by the manufacturer's American subsidiary.
The scope of supply includes a turbine generator and the D-EHC digital control system with start-up optimized according to rotor thermal stress. The manufacturer's turbine units operate significantly longer than the expected 20 years, and one unit in Australia has shown 99.6 % reliability. The company also provides service, repair and upgrades of turbines and generators.
Technical specifications
| Design | reverse-flow HIP cylinder + two double-flow LP cylinders, three casings |
|---|---|
| Output | up to 800 MW |
| Main steam pressure | up to 251 bar(a) (up to 271 bar per the 2024 catalog) |
| Main steam / reheat temperature | up to 600 °C / 620 °C |
| Grid frequency | 50 or 60 Hz |
| Exhaust | downward or sideways |
| Fleet operating experience | more than 2.5 million h |
Request a price and lead time
TX-6 three-casing steam turbine with four-flow exhaust up to 800 MW. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8406 81 00 00 |
|---|---|
| HS, 6 digits | 8406 81 |
| CN (EU) | 8406 81 00 |
| HTSUS (USA) | 8406 81 10 00 |
| China customs tariff | 8406 81 00 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What main steam pressure does TX-6 allow?
The series page gives up to 251 bar(a), the manufacturer's 2024 catalog gives up to 271 bar(a). Main steam temperature is up to 600 °C, reheat up to 620 °C.
How many casings does the turbine have and how is the exhaust arranged?
Three casings, that is a HIP cylinder and two double-flow LP cylinders with a four-flow exhaust. The exhaust is directed downward or sideways.
Where is TX-6 used?
In the steam section of high-output combined-cycle plants and in coal- and gas-fired steam turbine units up to 800 MW. The combined operating experience of the fleet exceeds 2.5 million hours.
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