Single-stage radial compressors – High efficiency, high reliability

Siemens Energy offers a comprehensive range of single-stage turbo-compressors for applications in the metallurgical, oil and gas and chemical industries. These single-stage radial compressors are offered in a variety of designs. They can be configured with separate or integrated gearboxes, or as directly driven units. This allows to perfectly match the compressor with a wide range of prime movers including steam turbines and electric motors to meet customer preferences and specific site conditions.

  • High flow, high efficiency impeller technology
  • High-speed balancing ensures long time uninterrupted operation
  • Hirth-serration connection between impeller and shaft eliminates the need for re-balancing after rotor disassembly
  • Horizontal split gearbox casing enables easy access in case of maintenance (where applicable)
  • Compact design option for steam turbine driven units (direct drive)
  • Compliance with API standards where required
  • Volume flow rates: 1,500 to 200,000 m³/h
  • Discharge pressure: up to 60 bar (100bar)
  • Power requirements: up to 25 MW
  • Driver options: electric motor, steam turbine
  • Acrylic Acid
  • Applications requiring compliance with API standards
  • Butanol
  • Direct Reduced Iron (DRI)
  • Ethylene Glycol
  • Ethylene Oxide
  • Oxo Alcohols
  • Synthetic Natural Gas
  • Vinyl Chloride Monomer (VCM)


Our single stage overhung compressor boasts a simple and robust design with well referenced components, smaller dimensions and less weight at the highest efficiency level, and low maintenance requirements.

In case of higher pressure ratio requirements, the configuration comprises two single stage overhung machines driven by a double-ended steam turbine drive between the compressors.


  • Outstanding impeller technology for high capacity and high efficiency
  • Large flow range
  • Simple, robust design in accordance with API 617
  • High efficiency
  • Highest reliability due to well referenced components
  • Low service intensity
  • Easy maintenance
  • Small dimensions
  • Low weights
  • Low spare part costs
  • Comprehensive driver options

Technical data

  • Volume flow rates up to 1,000,000 m³/h / 590,000 cfm
  • Pressure ratio up to ~3 (up to ~6.5 in case of 2 units) and up to 6.5 in case of two units in tandem arrangement
  • Suitable for electric motor, steam turbine or gas turbine drive
  • For two unit arrangement, the compressors are suitable for intercooling or uncooled compression


  • Regeneration air applications in PDH (Propane DeHydrogenation) plants
  • Blast furnace blowers
  • Fluid Catalytic Cracking 
  • Main Air Compressor for Air Separation units