SGT-400 industrial gas turbine

Twin-shaft engine for mechanical drive and power generation

    Rotate product

    Suitable for simple cycle, combined cycle and cogeneration; high steam-raising capability

    Variable guide vanes for robust operability and optimized part-load efficiency

    Compressor bleed valves protect against stalling and surging conditions

    Twin-shaft design provides core commonality for mixed-duty applications requiring power and compression

    Multiple borescope ports for visual inspection without disassembly

    Dry Low Emissions (DLE) combustor covers wide operating range

    Core engine can be serviced on- or off-site

    Simple cycle power generation (ISO) up to 0 MW(e)

    Mechanical drive: up to 14.9 MW

    Broad flexibility in fuels, operating conditions, maintenance concepts, package solutions, and ratings


    Robust twin-shaft turbine with highest efficiency in its power class

    The SGT-400 is a simple, robust twin-shaft gas turbine, suitable for both power generation and mechanical drive applications. The product services the 10 – 15 MW power band and can be used in all climates, onshore and offshore. The SGT-400 gas turbine offers the highest efficiency in its power class, incorporating the latest aerodynamic and combustion technologies.
    All facts at a glance

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    Highlights of the SGT-400 gas turbine

    The SGT-400 has a proven design for maximum availability and power supply reliability. With over 15 years of operating experience, the SGT-400 is successful in both offshore and onshore applications.

    The SGT-400 is ideal for offshore oil and gas applications due to its compact dimensions, on-site or off-site maintainability, and high reliability.

    The SGT-400 is suitable for on-site maintenance. Furthermore it offers the option of rapid core turbine exchange to minimize downtime.

    The twin-shaft design offers you the advantages of less starting power requirements, excellent speed and load turndown characteristics, as well as a good part-load efficiency.
    The twin-shaft arrangement of the SGT-400 for both power generation and mechanical drive ensures commonality of parts in mixed-duty installations.

    The SGT-400 can be used for a wide variety of power generation applications, including:
    - Simple cycle applications
    - Combined cycle applications
    - Combined heat and power (CHP)
    - Power generation for the oil and gas industry; e.g., onshore for use in oil fields or refinery applications and offshore on platforms and FPSO vessels

    The SGT-400 is a proven drive solution in the oil and gas industry, for example as a compressor or pump drive – both onshore and offshore.  With its turbine speed range from 4,800 to 10,000 rpm, it can be used as a direct compressor drive without applying an intermediate gearbox.
    The gas turbine is designed for variable-speed applications and loads and is suitable for a wide range of requirements.

    Ingenious design to the core

    The SGT-400's twin-shaft design permits excellent speed and load turndown flexibility.
    The simple design consists of a 2-bearing gas generator rotor with an 11-stage axial flow transonic compressor, and a 2-stage overhung compressor turbine. The SGT-400 free power turbine also has a robust 2-stage, overhung design.

    The rotors are contained in heavy-duty casings which are horizontally and vertically split, so you can carry out maintenance on-site. The compressor uses variable guide vanes for robust operability and optimized performance across a range of operating conditions.

    The gas turbine is equipped with a Dry Low Emissions (DLE) combustion system, which achieves low NOₓ emissions with both gaseous and liquid fuels.

    SGT-400 packages

    The compact SGT-400 gas turbine packages for power generation and mechanical drive applications are equipped with factory-tested modules, and offer a high power-to-weight ratio. The packages consist of gas turbine, gearbox, driven unit and all factory-tested fluid modules, mounted on an underbase, which are easily transported, installed and maintained on site.

    The shop-tested and certified fluid system modules are common for all SGT-400 gas turbine packages and come fully wired into the package control systems:

    • Auto drains module
    • Gas fuel module
    • Lube oil module
    • Liquid fuel module (optional)

    Suitable for offshore oil and gas applications

    The SGT-400 is an ideal offshore gas turbine.

    It can be used: 
    - for offshore power generation, e.g., on oil platforms and FPSO vessels
    - as a drive solution for pumps, e.g., for water injection in oil production, in crude oil processing and for the transport of refinery products via pipelines
    - as a drive solution for compressors for gas injection, to increase pressure in pipelines and in natural gas processing

    SGT-400 gas turbine packages on FPSO vessel

    Siemens delivered two SGT-400 power generation units to power the water injection system on the FPSO vessel "Cidade de Itajai", which operates at the Tiro and Sidon fields located in the southern part of the Santos Basin off the coast of Brazil.

    Rapid core exchange option for minimized downtimes

    Our comprehensive portfolio of services provides low life cycle cost and optimum performance throughout the turbine’s life cycle: Long Term Programs (LTP), overhaul service, field service, spare parts, service exchange, remote diagnostic service, and modernization and upgrades

    Siemens specialists offer on-site support all over the world.

    The core engine maintenance can be performed on-site or off-site.

    SGT-400 maintenance features:

    • Easy core engine change
    • Multiple borescope inspection ports to avoid unnecessary maintenance outages
    • Vertically and horizontally split intake casing
    • Horizontally split compressor casing
    • Combustion pressure casings split vertically for easy access to the combustion hardware

    Covering a wide Wobbe range

    The SGT-400 operates on a wide range of gases, including gaseous fuels outside of standard pipeline quality.

    It covers a Wobbe fuel range from approximately 50 MJ/m³ to 17.5 MJ/m³, which includes, e.g., fuels available in LNG liquefaction plants, wellhead gas and minimally processed weak wellhead gas, coke oven gas, biogas from ethanol industry waste, or landfill gas.
    The SGT-400 is also able to burn distillate liquid fuels and offers dual-fuel DLE capability, with automatic changeover from primary to secondary fuel at any load.

    Low emissions despite a rugged industrial design

    The well-proven and reliable Dry Low Emissions (DLE) combustor offers clean combustion with low emissions over a wide operating range.

    The SGT-400 uses six reverse-flow tubular combustion chambers positioned around a high-pressure casing. Each burner contains its own ignition source and is capable of gas-only, liquid-only or dual-fuel operation. The fuel is controlled by both a pilot and main burner, with the control system ensuring smooth changeover across the power range.
    With the DLE combustion system, you will comply with emission regulations even at lower operating loads down to 50% or lower.

    NOₓ emissions: ≤ 15 ppmvd (corrected to 15% O₂ dry)

    Technical data

    Performance data for simple cycle power generation

    *Other fuels on request

    **NOₓ emissions at 15% O₂ on fuel gas (with DLE)

    Performance data for mechanical drive

    *Other fuels on request

    **NOₓ emissions at 15% O₂ on fuel gas (with DLE)

    Physical dimensions and weight

    Dimensions exclude inlet filter housing and exhaust stack. For power generation, the AC generator is included. For mechanical drive, the driven equipment is excluded.

    The SGT-400 is suitable for the following applications and industries:

    Learn more about the SGT-400 gas turbine

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    Find out more about our gas turbine offerings

    In our download section, you can find brochures, technical papers, and more. Or you can contact us directly for specific inquiries.

    For more information, please contact our Customer Support Center.

    • +49 180 524 24 71

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    Experience the SGT-400 in commercial operation, worldwide

    With over 15 years of operating experience, the SGT-400 is proven in both offshore and onshore applications. Over 350 units have been sold with more than 3.5 million hours operating experience.



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