Siemens STC-GVT Compressor Series
Integrally geared, vertically split volute casing and single or multi-stage expanders or integrated turbine drive
Since its inception 60 years ago, the Siemens STC-GV compressor series has been meeting demands for compression solutions with high efficiencies. Comprising either single or multi-stage expanders or an integrated turbine drive, the Siemens STC-GVT series builds on reliable compressor technologies. Designed in accordance with customer specifications and with both API 617 and API 672, Siemens STC-GVT guarantee the highest quality and technical standards for a broad range of industrial applications.
Highlights
- The perfect match for 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
- Direct reduction
- Nitric Acid
- Phenol
- Synthetic fibers
Design Concept
The Siemens STC-GVT integrally geared centrifugal compressors with single or multi-stage expanders feature a multi-shaft arrangement with different speeds. All shafts are mounted in maintenance-free, oil-lubricated hydrodynamic bearings. 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.
Package
Package and driver options
For most STC-GV compressor sizes, Siemens offers a package design. The package includes the compressor, driver, process gas coolers, lube oil console, process piping and all tubing and wiring. The package design leads to significantly reduced on-site installation time. These compressor types are also suitable for direct turbine-drive or integrated turbine design (Siemens STC-GVT).
Highlights
- Integrally geared, multi-stage design
- Up to three expansion stages
- 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
- 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 code API 617 + API 672
GVT with expansion stage(s)
- Inlet guide vane unit in front of each stage
- Optional interheating between stages
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 60 bar (870 psi) air and other gases
Driver: depending on process and energy resources: steam turbine, gas turbine or electric motor, integrated steam turbine (package design).
Benefits
- 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