Design Concept STC-SV  Reliable Design
Designed to compress gases of any molecular weight and optimized for those with low molecular weight, STC-SV is ultimate for high pressure services, covering a discharge pressure range up to 1,000 bar.
All compressor internals assembled into a bundle allow easy axially removing from the casing shell without the need to remove process gas piping. A wide variety of sealing systems (labyrinth seals, carbon ring seals and mechanical dry gas seals) completes the reliable compressor design. Mechanical dry gas seals, in combination with active magnetic bearings for compressor and driver, yield the special economic and environmental benefits of dry-dry equipment operation.
Sophisticated Technology
The reliable avoidance of subsynchronous rotor vibration caused by gas forces in labyrinth seals and diffusers is the key to the high-pressure compressor design. Within sustainable research and development, Siemens provides a series STC-SV compressor supplying over 900 bar discharge pressure with nitrogen. Due to technical expertise, Siemens can reliably predict rotor-dynamic behavior in ultra-high pressure environments, with results verified in PTC 10 class 1 tests.
Highlights
- Up to four process stages per casing
- Up to ten impellers per casing
- Intercooling and sidestreams
- Barrel-type design allowing full maintenance without disconnecting process gas lines
- Proven, fully parametric aerodynamic design concept
- Adjustable inlet guide vanes (IGV) in front of the first impeller offering advantages regarding turndown and part-load efficiencies in certain applications
Control Systems
Perfect protection and process control via flexible Siemens control systems:
- Anti-surge protection
- Performance controllers acting on mass flow, suction or discharge pressure
- Controlled by either IGV control, throttling, bypass operation or speed variation, thus operation with all available drive systems, i. e. electric motors, steam and gas turbines
- Fully or semi-automatic start-up and shutdown sequences exactly matched to your process demands
- Certified safety systems available
- Load-sharing controller for parallel trains
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