Siemens STC-GV Compressor Series
Integrally Geared, Vertically split volute casing
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