What is the SGT-A35 gas turbine?

The SGT-A35 is an aeroderivative gas turbine that delivers between 32 and 39 MW of power and mechanical drive. It is designed specifically for demanding applications in the oil and gas industry, both offshore and onshore.

In which applications can the SGT-A35 be used?

It is used for electrical power generation and mechanical drive applications in pipelines, LNG plants, FPSOs and refineries, as well as other onshore and offshore facilities.

What makes the SGT-A35 highly reliable?

The turbine has a legacy of over 50 years of continuous improvement and has accumulated more than 50 million operating hours, with hundreds of units in service worldwide.

How flexible is the SGT-A35 in terms of configuration?

The portfolio includes multiple gas generator and free power turbine variants, with and without Dry Low Emissions (DLE) combustion, to match different power, speed, and application requirements.

What are the main benefits of the 2‑spool aeroderivative design?

The 2‑spool architecture provides high operational flexibility, fast start capability, tolerance to transient loads, and eliminates “hot lockout” restrictions after shutdowns.

Can the SGT-A35 operate on different fuels?

Yes, it is a dual-fuel turbine capable of operating on gaseous and liquid fuels, with automatic changeover and the ability to handle challenging fuel compositions.

Does the SGT-A35 support low-emission operation or hydrogen?

With DLE options, the SGT-A35 can achieve very low NOₓ and CO emission levels, and selected burner configurations allow operation with high hydrogen content in the fuel mix.

Why is the SGT-A35 well suited for offshore use?

Its compact, lightweight package offers high power density and a small footprint, reducing topside weight and CAPEX while meeting stringent offshore standards.

How easy is maintenance on the SGT-A35?

Thanks to its aeroderivative design, major components such as the gas generator can be exchanged quickly on-site, minimizing downtime and life-cycle costs

What service and support are available for SGT-A35 installations?

Siemens Energy provides global 24/7 support including long-term programs, field service, spare parts, remote diagnostics, and upgrades to keep the turbine operating at peak performance throughout its lifecycle.

SGT-A35 aeroderivative gas turbine

The SGT-A35 is renowned for its reliability and availability in power generation and mechanical drive applications within the oil and gas industry. This aerodative gas turbine has a solid reputation for onshore and offshore service and has accumulated over 50 million operating hours, with over 900 units sold.

It is the latest evolution of a technology portfolio that has been refined over 50 years and utilises proven components from industrial, marine and aerospace services. The engine can burn up to 100% hydrogen with WLE burners and up to 15% with DLE burners. The SGT-A35 provides class-leading power density in a compact, lightweight and easy-to-maintain package, which is designed specifically for oil and gas applications.

The SGT-A35 portfolio includes 2 variants of gas generators and 3 variants of free power turbines, allowing multiple combinations with power output ranging between 32 and 38 MW in mechanical drive, and different drive-shaft speed. Each variant is available with or without Dry Low Emissions (DLE) combustion and can be configured for electrical generation or mechanical drive, onshore or offshore. Such a diverse portfolio ensures that the gas turbine can be ideally matched to your requirements of each application.

The SGT-A35 has earned the trust of operators in a large spectrum of applications, in the power industry as well as in oil and gas. The SGT-A35 legacy spans over 50 years of continuous improvement through the incremental injection of aero engine technology. Over 900 SGT-A35 units have been sold to date, accumulating a service experience of over 50 million operating hours. The SGT-A35 is regarded as a class leader for reliability.

All variants of the SGT-A35 can be restarted at any time following a shutdown from any condition, without any delay due to "hot lockout" conditions. Unlike some of its competitors, the SGT-A35 can achieve this reliably by inherent design. Thanks to its agile twin-spool architecture, the SGT-A35 provides the most robust solution to restoring power quickly when its availability is most critical.

The SGT-A35 is the latest evolution in the portfolio, introducing a synchronous speed variant to the existing highspeed power turbine coupled to the prove gas generator to allow direct drive or geared drive of an electrical generator.

The SGT-A35 can also be utilized in mechanical drive applications, making it one of the most flexible gas turbines in its range. Its performance is optimized for hot climates, delivering significantly more power at 30 °C than its predecessors.

The SGT-A35 brings to oil and gas operators the trusted technologies acquired by Siemens Energy aeroderivative gas turbine portfolio. The reliable SGT-A35 gas turbines, with over 890 units supporting oil and gas operations worldwide, are now packaged with the oil and gas expertise of Siemens Energy, which has supplied over 1,000 units to the oil and gas industry over the years.
The SGT-A35 package leverages the best designs and know-how of two trusted names in the oil and gas industry to produce superior customer value.

Ingenious design to the core

The SGT-A35 uses an aeroderivative, 2-spool gas generator aerodynamically coupled to a free power turbine. Two variants of gas generators and two variants of power turbines are available to perfectly match your requirements in each application.
The 2-spool architecture allows maximum operational flexibility, resulting in a gas turbine with high tolerance to transient excursions and challenging mission cycles, fast starting and with no "hot lockouts". All variants can operate on gaseous and liquid fuel, and can be configured with an optional Dry Low Emission (DLE) combustor.

Well proven in all environments

The SGT-A35 is the result of over 50 years of technological innovation. Utilizing aero engine technology with millions of operating hours accumulated in flight, the SGT-A35 has built a vast experience base of their own with over 50 million hours operating in power generation and mechanical drive service, onshore and offshore and in the most challenging environments.

SGT-A35 package: optimized for offshore

The SGT-A35 gas turbine is integrated into a compact package, proven in offshore oil and gas applications, offering a minimal footprint and the highest power density in its class. This maximizes production, reduces topside weight, lowers upfront capital investment, and increases long-term value creation. The design is reliable and compliant with the requirements of offshore oil and gas applications, including FPSO vessels.

Comprehensive services to support you

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.
Whether for scheduled service or short-term support, our specialists are there for you, on-site all over the world.
Maintenance of the SGT-A35 engine can be accomplished quickly and easily due to the aero engine design.

High fuel flexibility for a broad application range

The SGT-A35 is a dual-fuel gas turbine capable of automatic changeover between gaseous and liquid fuels. It has been tested with a broad variety of gaseous and liquid fuels, including high proportions of inert gases found in deep sea offshore applications. The engine can burn up to 100% hydrogen with WLE burners and up to 15% hydrogen with DLE burners. A Dry Low Emission (DLE) option is available for all SGT-A35 variants.

	SGT-A35 (GT62) DLE	SGT-A35 (GT62)	SGT-A35 (GT61 34 MW) DLE	SGT-A35 (GT61 34 MW)	SGT-A35 (GT61 34 MW) Direct Drive DLE 60 Hz	SGT-A35 (GT61 34 MW) Direct Drive 60 Hz	SGT-A35 (GT61 34 MW)
Power output	31.8 MW(e)	32.1 MW(e)	33.7 MW(e)	34.5 MW(e)	32.2 MW(e)	34.5 MW(e)	38.1 MW(e)
Fuel*	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel
Frequency	50/60 Hz	50/60 Hz	50/60 Hz	50/60 Hz	60 Hz	60 Hz	50/60 Hz
Gross efficiency	37.8%	38.0%	39.1%	39.4%	37.8%	38.0%	40.5%
Heat rate	9,535 kJ/kWh (9,037 Btu/kWh)	9,473 kj/kWh (8,979 Btu/kWh)	9,199 kJ/kWh (8,719 Btu/kWh)	9,137 kJ/kWh (8,660 Btu/kWh)	9,529 kJ/kWh (9,031 Btu/kWh)	9,476 kJ/kWh (8,981 Btu/kWh)	8,881 kJ/kWh (8,418 Btu/kWh)
Turbine speed	4,800 rpm	4800rpm	4,850 rpm	4,850 rpm	3,600 rpm	3,600 rpm	4,850 rpm
Pressure ratio	22.0 : 1	22.6 : 1	22.4 : 1	23.0 : 1	22.3 : 1	23.6 : 1	24.5 : 1
Exhaust mass flow	97.7 kg/s (215.6 lb/s)	98.6 kg/s (216.9 lb/s)	97.8 kg/s (215.6 lb/s)	99.2 kg/s (218.2 lb/s)	98.1 kg/s (216.3 lb/s)	101.0 kg/s (222.7 lb/s)	105.4 kg/s (232.4 lb/s)
Exhaust temperature	487 °C (905 °F)	483 °C (901 °F)	487 °C (909 °F)	486 °C (907 °F)	494 °C (921 °F)	506 °C (943 °F)	484°C (903 °F)
NOₓ emissions**	15 – 25 ppmvd		15 – 25 ppmvd		≤ 25 ppmvd

	SGT-A35 (GT62) DLE	SGT-A35 (GT62)	SGT-A35 (GT61 39 MW)	SGT-A35 (GT61 34 MW)	SGT-A35 (GT61 34 MW) DLE
Power output	33.1 MW	33.5 MW	39.5 MW	35.8 MW	34.9 MW
Fuel*	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel	Natural gas, liquid fuel, dual fuel
Efficiency	39.4%	39.6%	42.0%	40.8%	40.5%
Heat rate	9,142 kJ/kWh (8,665 Btu/kWh)	9,083 kJ/kWh (8,609 Btu/kWh)	8,572 kJ/kWh (8,125 Btu/kWh)	8,820 kJ/kWh (8,360 Btu/kWh)	8,880 kJ/kWh (8,417 Btu/kWh)
Drive shaft speed	3,120 – 4,800 – 5,040 rpm	3,120 – 4,800 – 5,040 rpm	3,153 – 4,850 – 5,093 rpm	3,153 – 4,850 – 5,093 rpm**	3,153 – 4,850 – 5,093 rpm**
Pressure ratio	22.1 : 1	22.6 : 1	24.6 : 1	23.0 : 1	22.4 : 1
Exhaust mass flow	97.7 kg/s	98.6 kg/s (217.4 Ib/s)	105.4 kg/s (232.4 lb/s)	99.2 kg/s	97.8 kg/s
Exhaust temperature	485 °C (905 °F)	481 °C (898 °F)	484 °C (903 °F)	486 °C (907 °F)	487 °C (909 °F)
NOₓ emissions**	15 - 25 ppmvd				15 - 25 ppmvd
				**high speed variant	**high speed variant

Lula and Guará oilfields project offshore Brazil

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	SGT-A35 (GT62) DLE	SGT-A35 (GT61 34MW) DLE
Gross power output	39.8 MW(e)	42.6 MW(e)
Gross plant efficiency	51.4%	52.8%
Gross heat rate	7,005 kJ/kWh (6,639 Btu/kWh)	6,820 kJ/kWh (6,464 Btu/kWh)
Pressure/ Reheat	Dual/ No	Dual/ No

	Power generation package (direct drive)	Mechanical drive package
Approx. weight	165,700 kg (364,500 lb)	72,500 kg (159,500 lb)
Length	18.9 m (62 ft)	9.0 m (29.5 ft)
Width	3.4 m (11 ft)	3.4 m (11 ft)
Height	4.5 m (15 ft)	4.5 m (15 ft)

SGT-A35 aeroderivative gas turbine

Key benefits of the SGT-A35 gas turbine technology

SGT-A35 case studies

SGT-A35 technical features and power plant integration

Ingenious design to the core

Well proven in all environments

Robust and seaworthy

SGT-A35 package

SGT-A35 package: optimized for offshore

Comprehensive services to support you

Global presence to support you

Designed for maintenance and availability

High fuel flexibility for a broad application range

DLE option available

SGT-A35 technical specifications and performance benchmarks

Performance data for simple cycle power generation

Performance data for combined cycle power generation

Performance data for mechanical drive

Physical dimensions and weight

Find out more about Siemens Energy gas turbine offerings

Gas turbine portfolio (interactive PDF)

Combined cycle power generation for offshore applications

SGT-A35 poster

Experience the SGT-A35 in commercial operation, worldwide

Lula (Tupi) and Guará oilfields, offshore Brazil (2017)

West-East Gas Pipeline, China (2015)

Get in touch with us

Get answers: FAQs on SGT-A35

SGT-A35 aeroderivative gas turbine

Key benefits of the SGT-A35 gas turbine technology

Flexible application match

Vast experience, trusted performance

No “hot lock-out” periods

Evolved from proven components

Combining the best in the industry for oil and gas

SGT-A35 case studies

SGT-A35 technical features and power plant integration

SGT-A35 technical specifications and performance benchmarks

Find out more about Siemens Energy gas turbine offerings

Gas turbine portfolio (interactive PDF)

Combined cycle power generation for offshore applications

SGT-A35 poster

Experience the SGT-A35 in commercial operation, worldwide

Lula (Tupi) and Guará oilfields, offshore Brazil (2017)

West-East Gas Pipeline, China (2015)

Get in touch with us

What is the SGT-A35 gas turbine?

In which applications can the SGT-A35 be used?

What makes the SGT-A35 highly reliable?

How flexible is the SGT-A35 in terms of configuration?

What are the main benefits of the 2‑spool aeroderivative design?

Can the SGT-A35 operate on different fuels?

Does the SGT-A35 support low-emission operation or hydrogen?

Why is the SGT-A35 well suited for offshore use?

How easy is maintenance on the SGT-A35?

What service and support are available for SGT-A35 installations?