Liquefier VL100 and LHe-Dewar at Augsburg
Our products at Vorbuchner

Gas Liquefication

Gas liquefaction

General process description

Liquid helium is mainly used for cooling superconductors and for researching quantum effects in low-temperature physics. It also plays an important role in magnetic resonance imaging (MRI) and space travel for cooling magnets and rocket engines.

Our helium liquefiers are fully automatic, processor-controlled refrigeration systems with screw compressors and expansion turbines for liquefying helium. Contaminated gas can also be processed using the integrated purifier.

In classic applications, helium is used as a coolant or liquefied. Depending on requirements, we also supply systems with others that liquefy hydrogen or nitrogen. 

Helimverflüssigung Pfeile


Mobil Dewar

Mobil Dewar

Coldbox VL100 liquefier


LHe Dewar

LHe Dewar

Impure Gas Adsorber

Impure Gas Adsorber

High Pressure Storage

High Pressure Storage

Gas Management System

Gas Management System

Cycle Compressor

Cycle Compressor

Pure Gas Buffer

Pure Gas Buffer

Vorbuchner DSC00308 Anlage Freisteller transparent bo kl


  • Universal applicability (condenser, refrigerator, radiant shield cooling)

  • Easy operation

  • Fully automatic operation

  • Automatic cleaner without external cooling

  • Modular, compact design

  • Extremely quiet and vibration-free

  • No special fastenings or foundations required

  • Optional - increased performance through LN2 pre-cooling

The cooling process

Cooling takes place according to the Claude process.


A screw compressor compresses purified helium from 1.05 to approx. 12.5 bar while constantly dissipating the resulting compression heat. Traces of oil are removed from the circulating gas by coalescer filters and a special oil absorber.


The actual refrigeration is generated by two dynamic gas-bearing expansion turbines connected in series, whereby part of the cycle gas is expanded to perform work. In stationary operation, the final temperature after the second turbine is approx. 12 K.

At temperatures below 8 K, part of the cycle gas is expanded to approx. 1.3 bar by a Joule-Thomson valve (JT). This produces partly liquid helium with a temperature of approx. 4.5 K. In the transfer line, the 4.5 K cold helium is transported from the Joule-Thomson valve to the liquid helium tank.

Heat exchanger

The helium cold gas produced during expansion is used together with the low-pressure flow from the turbines in a counterflow principle to cool the hot gas and is circulated continuously. Aluminum plate heat exchangers are used for this purpose.

Freeze-out purifier

In order to avoid displacements due to frozen impurities in the process, only pure helium may be used in the liquefaction circuit. However, helium that is fed into the recovery system is contaminated with air, nitrogen or other gases. The diffusion of air in various components (gas bubble / gasometer) also has a negative effect on the gas quality. In helium liquefiers, integrated purification lines that use the cold from the process gas are usually aimed for. This has the advantage that no additional operating fluids such as LN2 are required. In addition, the contaminated helium can be cooled to approx. 30 K in order to freeze out residual contamination. 

Liquefier VL100 and LHe-Dewar at Augsburg

Scope of services

  • Screw compressor
  • Gas Management System / Oil Remover System
  • Coldbox
  • Pure gas buffer
  • Dirt gas dryer
  • Control cabinet and SCADA system
A brief overview

Our references

Liquefication Room
Unia logo

Helium Liquefication Plant VL100

07/2023 | University Augsburg

WMI Logo

Helium Liquefication Plant VL100 & Recovery

03/2023 | Walther-Meissner Institute Munich

Coldbox VL100
Logo Leeds

Helium Liquefication Plant VL100

01/2023 | University Leeds

Liquefication System
Logo Caen

Helium Liquefication Plant VL100 & Recovery

11/2022 | University Caen la Mer

Container with HPS
Logo Heidelberg

Helium Recovery as Container Solution

11/2022 | University Heidelberg

Liquefication room
Zagreb Logo

Helium Liquefication Plant VL100

10/2022 | Institute of Physics Zagreb

Gas Ballon 30m³
Logo TU Dresden svg

Helium Recovery Plant

12/2021 | Technical University of Dresden

UHH Universität Hamburg Logo svg

Helium Recovery Plant

12/2021 | University Hamburg

Liquefication Room
Budapest university of technology and economics master s degree mechanical engineering c v 3945b46e79f4bbec103604917fe4b0fc

Helium Verflüssiger VL100

02/2021 | Universität Budapest

Gesamt 2
Logo Paderborn

Helium Liquefication Plant VL100 & Recovery

University Paderborn

Pure Gas Buffer and Cycle Compressor
Universität Bayreuth svg

Helium Liquefication Plant VL100

05/2019 | University Bayreuth

Liquefication Room

Helium Liquefication Plant VL100 with LN2 Pre-Cooling

12/2018 | Institute of Nuclear Physics, Krakow

Balloon with compressor
Logo Braunschweig

Helium Recovery Plant

08/2016 | PTB Braunschweig

Helium Storage Balloons
Technische Universität Dortmund Logo

Helium Recovery Plant

02/2013 | Technical University Dortmund

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