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Steam Turbine Generators (AT-Type)

Steam Turbine Generators (AT-Type)

MHI-MME's highly reliable AT-type steam turbine generators were developed using our original MHI-MME technology and feature excellent durability and cost performance.

Main Features

  • Economical
    • - High thermal efficiency
  • Compact design
  • Reliable and durable
  • Easy maintenance
    • - Replacement parts delivered quickly
  • Easy operation
  • Environmentally friendly
    • - Low vibration and noise
  • Compact Design

Lineup and Specifications

TurbinesType Horizontal, multi-stage impulse condensing turbine
No. of stages 4 to 10 Rateau 4 to 12 Rateau
Power range (kW) 200 to 2,000 1,000 to 4,000 1,500 to 6,000 3,000 to 15,000 5,000 to 18,000 15,000 to 27,000 20,000 to 45,000
Speed range (rpm) 11,000 to 15,000 8,500 to 11,700 6,500 to 9,500 5,000 to 7,500 5,000 to 6,000 4,000 to 4,500 3,000 to 4,200
Steam inlet pressure (MPa) 0.4 to 12.3
Steam inlet temperature (°C) Saturated temperature to 540
Exhaust pressure (mmHg) 400 to 722
Reduction gearsType Single helical, single reduction gear
Output shaft speed (rpm) 900 to 3,600
DimensionsWidth (mm) 1,600 1,800 2,000 2,300 4,000 4,000 4,000
Length (mm) 3,785 4,075 4,390 4,750 6,800 7,400 8,000
Height (mm) 1,635 1,890 2,185 2,500 3,000 3,100 3,200
Approximate weights (kg)
(excluding driven equipment)
6,000 7,100 8,400 10,500 30,000 38,000 45,000



After-Sales Services

In addition to periodic maintenance services, we offer a range of value-added services to increase customer satisfaction.

Featured service menu:

To manage operational efficiency effectively, it is vital to maintain high turbine efficiency. We provide various solutions to keep your turbines in optimal condition and reduce your operating costs.

Generator turbine dock maintenance items

We can provide a recommended dock maintenance parts list for the generator turbine that covers the docking schedule of each ship for the next 20 years. This list is a good reference for knowing what maintenance work is required when your ship is docked.

Provision of finished MSV and RV spare parts

We recommend inspecting the condition of the main stop valves (MSV) and regulating valves (RV), which are critical turbine parts. These parts should be checked regularly, every time you dock your ship, to check for progressive aging deterioration caused by exposure to high pressure, high temperature conditions and the high number of moving parts.Place an order with us for the required parts and we will have them ready for you when you commence your dock maintenance work.

Updating the shaft vibration and position monitor

The VM-3 model has been discontinued and maintenance is no longer available. However, current monitors can be replaced by the new VM-5 model without any modifications to your system.

Landed overhaul of MSV, RV, and power cylinder assembly

Main stop valves (MSV) and regulating valves (RV) play an important role in regulating turbine steam. These parts need to be inspected and/or replaced during the service inspection while the ship is docked. We will perform service inspections at our factory for vessels that have been in service for over 15 years as a precautionary measure.

Renewal of turbine observation panel

The turbine observation panel is equipped with alarms to indicate abnormal turbine operation, such as low pressure and high turbine exhaust pressure. We recommend the turbine observation panel be replaced in vessels that have been in service for 10 years or more.

Preparation of spare parts for governor driving gear

It has been verified that governor driving shaft worm gear pitching occurs in the worm wheel gear, causing damage and making it necessary to replace parts frequently.
We therefore have prepared a stockpile of spare parts to provide support in the case of gear damage.

Provision of finished MSV and RV spare parts at the depot

Main stop valves (MSV) and regulating valves (RV), which are critical turbine parts, have numerous moving parts and are subject to high pressure and high temperatures. These parts are serviced while the ship is docked, to check for deterioration.
We provide a complete set of MSV and RV spare parts, and can replace any part in the case of failure. We will also recondition the replaced parts and redeliver them as finished spare parts.

Rotor-gear spare parts stocked at the depot

Turbine rotors, blades and gears are critical parts, and we strongly recommend that our users store a complete rotor and gear assembly as common spare parts.