The SFG series

The SFG series is a range of integrally geared single-stage centrifugal turbo compressors. The semi-open impeller (3D design) is overhung mounted directly onto the high-speed shaft of the gearbox. Due to this design and the resulting minimum mechanical losses, the SFG series offers a very high efficiency and is the preferred solution for demanding duties in clean process gas or air service applications, even in harsh environments. Gas flows up to 250,000 m³/h can be handled. It provides state-of-the-art safety and reliability at lowest lifecycle costs to their owners.

The SFG series is optionally available in a design compliant to API Standard 672 or API Standard 617, Part 1 & 3.

For design pressures up to 50 bar (g) and gas flows up to 200,000 m³/h, the SFG series is also available in a high-pressure design to serve process gas applications and is typically provided with dry gas seals in double or tandem arrangement including a sealing gas panel.

Formerly known as

STC-GO (SFOG / SFNG / SFPG) or STC-GO (FO / FN / FP) - under Siemens
SFOG / SFNG / SFPG - under KK&K



  • Air Service
  • Copper Converter Blower
  • Industrial Evaporation Processes
  • Zero Liquid Discharge
  • Steam Assisted Gravity Drainage
  • Process Gas & Chemical Plants (PA, MA, MMA, EO/EG, Acrylic Acid, Oxo-Alcohol, PE, Ammonia, CTL/CTG etc.)

Key Features

  • Highest aerodynamic efficiency
  • Widest performance envelope on the market
  • Minimum cooling water requirements
  • Modular design principle
  • Standardized components
  • Wide range of proven aerodynamic impeller designs
  • Flow control via variable inlet guide vanes, variable diffusor guide vanes, speed control or combinations
  • Backward curved impellers or radial tip with three-dimensional blades
  • Excellent wear resistance over the complete impeller
  • Wide range of proven aerodynamic impeller designs
  • Maintenance friendly design
  • Installation in hazardous area possible


Technical Data

  • Flow rates from 3,000 up to 250,000 m³/h
  • Pressure ratio up to 3.5
  • Impeller diameter up to 1,120 mm
  • Driver: Electric motor or steam turbine
SFG compressor

Process Gas Applications

Technical Features

  • Design as per API Standard 617, Part 1 & 3
  • Materials for impeller and compressor housing according to project requirements
  • Dry Gas Seal (DGS) double or tandem arrangement
  • Sealing gas panel as per project specifications
  • Local Control Panel (LCP) according to project specifications


Technical Data

  • Flow rates from 3,000 up to 200,000 m³/h
  • Design pressure up to 50 bar (g)
  • Temperatures from -150 up to 500 °C
  • Impeller diameter up to 900 mm
  • Pressure ratio up to 3.0
SFG Compressor for process gas

Contact details

Raise an Enquiry Direct email address Direct Phone Number
Online Enquiry Form Thomas Baumann
Sales Director Industrial Compression
+49 6233 85 2532

SFG Turbo Compressor brochures

Download your copy of the brochures for Sulphuric Acid and Process Gas


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If you would like to submit an enquiry please get in touch.