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Principal Products and Applications

  • Cryogenic equipment for 'big science' including particle accelerators and laboratories with principal products comprising horizontal and vertical cryostats and vacuum insulated pipe and valves for liquid helium
  • Helium dewars and transfer pipes for laboratories and nuclear magnetic resonance (NMR)
  • Tanks, piping, valve boxes and loading stations for helium liquefaction plants
  • Hydrogen tanks, vacuum insulated pipe and custom products for liquid hydrogen

About Cryo Diffusion

Cryo Diffusion, founded in 1965, has developed a reputation for the design of high performance vacuum super insulated cryogenic equipment. Following acquisition by Chart in 2018, the company is focused on high quality engineered products for liquid helium and hydrogen and other specialty items that complement and extend Chart's cryogenic equipment portfolio.
Headquarters and manufacturing plant are located in Léry, France, and comprise 15,000m2 of production and office space.

Through its skilled technicians Cryo Diffusion provides a full spectrum of after-sales cryogenic services including turn-key projects, installations, commissioning, routine service, maintenance, on-site calibrations, diagnostic and repair, refurbishment, upgrade and de-bottlenecking.

Special Products


Vacuum super-insulated on-frame tank for storage and multi-modal transport of liquid nitrogen.

Cryopack nitrogen transportable ISO container

  • Suitable for transport by road, rail and sea
  • Can be locked together as a 20 ft ISO equivalent unit or stacked up to 7 levels
  • Liquid hold time up to 30 days
  • Design approvals include EN12079, ASME, ADR, IMDG-5, RID, IMO, CSC, ISO, DNV2.7-1, GOST

Cold Gas Generator (CGG)

CGG is a vacuum super-insulated vertical cryogenic tank with incorporated thermal heat exchanger and gas mixer that generates nitrogen gas up to 77K.
Designed and built in accordance with PED 2014/68/UE.
Equipment is especially useful for bench testing of satellites under vacuum and at cryogenic temperatures and conditions.
Model 400 liters
Total height (mm) 2,460
Nominal inner height (mm) 1,413
Max inner height (mm) 1,700
External diameter (mm) 700
Maximum working pressure (bar) 10
Hydraulic test pressure (bar) 15.73
Total capacity (liters) 500
Useful capacity (liters) 400
Empty weight (kg) 380
Full weight with nitrogen (kg) 703
Static evaporation rate (liters/day) 10

Hydrogen Purifier

Vacuum super-insulated vertical cryogenic tank including heat exchanger and adsorbent high-pressure tank, using the cold trap principle, with liquid nitrogen.

Mobile Gas Filling Stations

Complete mobile cryogenic filling stations for high pressure gas cylinders and bundles. Fully automatic skid mounted system incorporating cryogenic storage tank, pump and vaporizer.

mobile gas filling stations

  • Suitable for nitrogen, oxygen and argon
  • Tank sizes for 3,000, 5,000 and 12,000 liters of liquefied gas
  • Pressure up to 350 bar
  • Design in accordance with PED or ASME

Contact Cryo Diffusion

Discuss your project requirements or receive application advice from one of our knowledgeable and multilingual staff.

Telephone  +33 2 32 59 03 68

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