Skip to main content

Helium refrigeration around 4.5 K

Customized refrigerators for large cryogenic projects

Our 4.5 K refrigerators can cool any cryogenic application requiring cooling power from 500 W to 30 kW and more.

Designed for research centers using superconductors for their experiments: particle accelerators, nuclear fusion experimental reactors, synchrotrons, our refrigeration systems are custom designed for the needs of the customer's applications. They include the helium refrigerator capable of delivering helium in the required form (liquid, supercritical...) not only at 4.5 K but also at the required intermediate temperatures (80 K shielding...), as well as the fluid storage and distribution system, and the purification systems if required

Key benefits

  • High performance: customized systems with optimum efficiencies allowing a reduction in operating costs
  • Reduced maintenance: through the choice of high reliability components requiring reduced maintenance
  • Reduced operating crew: by automating the operation of the units in standard daytime hours and not in shifts (3x8h...)

Main technical characteristics

  • Lubricated screw compressors
  • Oil removal system and cycle pressure management
  • Cold box integrating Air Liquide turbines with static gas bearings
  • Nitrogen pre-cooling included if necessary
  • Automatic management of the system's cooldown, nominal operation of the refrigerator and its shutdown
  • Optional storage and distribution equipment


  • ASME Stamp U (USA) - HPGSL (Japan) - AQSIQ (China)
  • CE / ASME marking without stamp


  • Helium cooling systems for the LHC accelerator at CERN
  • Helium refrigeration systems for the KSTAR tokamak
  • Helium refrigeration systems for the ITER Tokamak
  • Helium refrigeration systems for the LCLS-II accelerator at SLAC

Contact Us

For more information, find on this page your key contacts and our contact form.

Contact Us


Air Liquide is recognized as a partner of scientific research. We design and supply cold production, liquefaction, and cryogenic fluid storage and distribution systems for laboratories and large scientific equipment.

Discover our solutions