Siemens STC-GV Compressor Series

Since its inception 60 years ago, the Siemens STC-GV compressor series has been meeting demands for compression solutions with high efficiencies and pressures up to 200 bar. Siemens STC-GV compressors, designed according to customer specifications and in accordance with both API 617 and API 672, guarantee the highest quality and technical standards for a broad range of industrial applications.

Highlights

• The perfect match for all air-separation and process-industry requirements
• High efficiency and outstanding operating range
• Powerful and robust design, with integrated turbine or expander options
• Flexible design concepts combining custom-tailored design with standardized components for maximum reliability
• Siemens is the only compressor manufacturer who also develops and supplies proprietary gear technology

Applications

• Air separation
• Ammonia
• Carbon capture and storage
• Ethylene oxide
• Flare mitigation
• Fuel gas
• Hydrocarbons
• Metallurgy
  • Direct reduction
  • Direct smelting
• Petrochemicals
• Phenol
• Refineries
• Synthetic fibers

Design Concept

Powerful, Robust and Reliable

The Siemens STC-GV integrally geared centrifugal compressors feature a multi-shaft arrangement with different speeds. All shafts are mounted in maintenance-free, oil-lubricated hydrodynamic bearings. With up to eight compressor stages around a central bull gear, the Siemens STC-GV compressor series forms a compact unit for the multi-stage compression of a wide range of gases.

Optimized shaft speeds, modern impellers, tailored aerodynamics and mechanics along with optimized auxiliaries guarantee the highest efficiency. Adjustable guide vane units at the first and / or any other compression stage optimize the operating range. External cooler arrangements allow for operation at extreme site conditions.

Highlights

• Integrally geared, multi-stage design
• Wide operating range and outstanding part-load efficiency at turndown
• Multi-service capability due to finely-graded standard components
• Feeds multiple functions from one casing
• Can be used in toxic, corrosive and hydrocarbon applications
• Up to eight stages
• Casing (volutes) fabricated or cast – material: from cast iron to stainless steel
• Axial inlet to each impeller, intercooling between stages
• High-efficiency water separators
• Flexible cooler design
• Design options for any kind of gas
• Design code API 617 + API 672

Control Systems
Perfect protection and process control via flexible Siemens compressor automation (SCAUT) control systems:

• Anti-surge protection
• Performance controllers acting on mass flow, suction pressure or discharge pressure
• Simultaneous control of sets of variable inlet guide vanes
• Controlled by throttling, bypass operation or inlet whirl variation
• Operation with all available drive systems, i. e. electric motors, steam turbines and gas turbines
• Fully automatic or semi-automatic start-up and shutdown sequences exactly matched to customers’ process demands
• Certified safety systems available

Technical Data

• Volume flow rates up to 480,000 m³/h (280,000 cfm)
• Discharge pressure up to 100 bar (1,450 psi) air and other gases
• Discharge pressure up to 200 bar (2,900 psi) CO2
• Gearbox ratings up to 60,000 kW (80,000 hp)

Benefits

• Proven design concept, patented in 1948
• High efficiency and wide operating range
• Multi-service capability and various application options in one casing
• Long life due to process-optimized materials
• Cost-efficient, compact compression solution
• Siemens-owned gear technology
• Flexible cooler design
• High-efficiency water separators