Siemens SGT-300 Industrial Gas Turbine

Overview

The Siemens SGT-300 is an industrial gas turbine from Siemens Energy, built for power generation, combined heat and power (cogeneration), and mechanical drive duty in demanding oil, gas, and industrial applications. Offered in a single-shaft configuration delivering 8.0 MW of electrical power output, and a twin-shaft mechanical drive configuration rated at 8.4 MW or 9.1 MW, the SGT-300 is engineered for compact packaging and on-site maintainability, with a proven fleet exceeding 200 units sold and over 10 million equivalent operating hours logged at a class-leading 99.5% reliability rate.

Seven Star LLC supports oil and gas operators, refineries, and industrial power plants across Oman and the GCC specifying or maintaining Siemens Energy gas turbine equipment, including the SGT-300, as part of our authorized-partner instrumentation and rotating equipment supply chain. Our team can help coordinate spare parts, control system components, and instrumentation packages associated with SGT-300 installations, and can put your project in direct contact with Siemens Energy for turbine packages, long-term service programs, and field engineering support.

Measurement and Operating Principle

The SGT-300 operates on the Brayton cycle: ambient air is drawn through a 10-stage axial compressor with a pressure ratio of roughly 14.4:1 (single-shaft) or 13.9-14.6:1 (twin-shaft), compressed air is mixed with fuel and combusted in a can-annular arrangement of six reverse-flow tubular combustion chambers, and the resulting hot gas expands through the turbine section to drive the compressor and, on the single-shaft version, an integral generator directly. The twin-shaft version separates a 2-stage gas generator turbine from a 2-stage power turbine, allowing variable output speed for mechanical drive applications such as compressor or pump drive duty.

Each of the six combustor cans uses its own high-energy igniter and a Dry Low Emissions (DLE) burner system with both pilot and main fuel staging, allowing the control system to manage a lean air-fuel premix across the load range for low NOx and CO emissions while maintaining flame stability. Automatic fuel changeover between primary and secondary fuel sources is possible at any load point, and the DLE burners are qualified to burn up to 30 vol% hydrogen blended with natural gas, giving the SGT-300 a route toward lower-carbon operation without a full combustor redesign.

Engineering Design

The single-shaft SGT-300 uses a single twin-bearing rotor within a heavy-duty, horizontally split compressor casing, engineered to permit rapid core engine exchange on-site – a design choice that significantly cuts maintenance-related downtime compared with turbines requiring full off-site overhaul. The compressor’s first-stage rotor blades can be removed axially for quick on-site inspection and replacement, and multiple borescope ports allow internal visual inspection without disassembling the machine, letting maintenance teams schedule interventions based on actual condition rather than fixed calendar overhauls alone.

The complete SGT-300 package – gas turbine, gearbox where applicable, driven equipment interface, and factory-tested fluid modules (auto drains, gas fuel, lube oil, and optional liquid fuel modules) – is mounted on a single underbase for straightforward transport and installation. The power generation package weighs approximately 59,000 kg and measures 11.9 m long, while the more compact mechanical drive package weighs around 30,400 kg, reflecting the different footprint and equipment loadout between the two configurations.

Siemens SGT-300 Key Features

• Siemens SGT-300 delivers 8.0 MW (single-shaft) or 8.4/9.1 MW (twin-shaft mechanical drive) power output
• Dry Low Emissions combustion system with NOx below 10-15 ppmvd on gas fuel
• Capable of burning up to 30 vol% hydrogen blended with natural gas via DLE burners
• Rapid core engine exchange minimizes on-site maintenance downtime
• High steam-raising capability exceeding 18 tonnes/hour supports 80%+ plant efficiency in cogeneration
• Axially removable first-stage rotor blades and multiple borescope ports for condition-based inspection
• Wide Wobbe fuel range coverage, including wellhead gas, LNG boil-off, and biogas fuels
• Fleet-proven reliability of 99.5% across more than 200 installed units worldwide

Industrial Applications for the Siemens SGT-300

The Siemens SGT-300 is deployed in simple-cycle and combined-cycle power generation, industrial cogeneration with high heat demand, and mechanical drive service for crude oil transport pumps, water injection pumps, and gas compression in pipeline and gas processing applications. It is a common choice for onshore oil field power generation, refinery applications, and offshore platform or FPSO power in the oil and gas sector where compact packaging and on-site maintainability are critical.

Seven Star LLC, as part of the authorized-partner instrumentation and industrial equipment ecosystem serving Oman and the wider GCC, supports refinery, gas processing, and cogeneration operators in Muscat, Sohar, Duqm, and Salalah running Siemens Energy gas turbines, coordinating instrumentation, control system, and spare parts requirements alongside Siemens Energy’s own service organization.

Siemens SGT-300 Technical Specifications

Request a Quote

Contact Seven Star LLC to discuss instrumentation, spares, and project support for a Siemens SGT-300 gas turbine installation in Oman and the GCC.

Seven Star LLC stays engaged with Siemens SGT-300 operators in Oman throughout the turbine lifecycle, from commissioning support to ongoing instrumentation and spares sourcing.