Helium gas purifier

ATP30 and LN2 trap from Quantum Design

Helium gas purifiers are used to remove impurities that are part of the air like oxygen, nitrogen, water etc., and other contaminants like oils and hydrocarbons from the helium gas. To achieve this, the gas incl. the impurities is cooled to cryogenic temperatures to freeze out all parts of the gas mix except for the helium. Depending on the purifier, the cooling power is either provided by liquid nitrogen (LN2 cooling trap) or by a cryocooler (Advance Technology Purifier or ATP).

  • Freeze out impurities
  • Entry quality < 1% impurities
  • Helium purity > 99,999%
  • Easy operation

Further information

The Advanced Technology Purifier (ATP) can purify up to 30 liters of helium gas per minute. At this pace, it is the system of choice for providing clean helium gas to Quantum Design’s Advanced Technology helium Liquefiers (ATL).  ATP-cleaned helium gas has an ultra high purity of 99.9995% or better at a pressure of about 2 bar. Like the Advance Technology Liquefier (ATL), the ATP is fully automated and can regenerate within five hours. One ATP is normally sufficient to deliver enough clean helium gas for two ATL160 liquefiers. The system is used in the high-pressure recovery system.

The ATP30 uses a Gifford-McMahon (GM) cryocooler to freeze out impurities like nitrogen and oxygen in the helium gas. The GM cryocooler has a closed helium gas loop that is pressurized by a compressor and then expanded in the cold head of the purifier. This generates low temperatures that cool down the dewar and the helium gas inside. The helium purifier is easy to install and can easily be operated in any laboratory. A touch screen panel allows easy control of the automated system. The ATP30 is part of the high-pressure recovery system, which catches helium boil off in a gas bag and stores it in gas cylinders, which are pressurized by a high-pressure helium gas compressor. In the high-pressure recovery system, impurities like oxygen and nitrogen diffuse through the plastic gas bag into the helium gas. These impurities are separated from the helium gas by the ATP30, so that the clean helium gas can be liquefied again.

LN2 trap
A nitrogen trap is an easy and sophisticated tool to purify helium gas. Helium gas with a purity of 99% or more is led through a trap filled with liquid nitrogen. All gases except helium freeze out during this process. Depending on the amount of impurities, the trap must be regenerated (warmed up) and the continuously evaporating liquid nitrogen must be refilled.



  • Purification rate: 30 liters of gas per minute
  • Purity: 99.9995% (better than UHP)
  • Fail safe operation
  • Regeneration time: 5 hours (fully automatic)
  • System dimensions (L x W x H): 60 x 69 x 148 cm
  • Compressorl: Air or water-cooled
  • Typical power consumption and Voltage range: 6,5-7,5 kW; high voltage
  • Fully automatic control, operation via touch screen pane

LN2 trap:

  • Includes insert, dewar, heater, lifting device, regeneration stand and dryer.
  • Economic purification solution for medium pressure and direct recovery systems.
  • Purity: > 99.000%
  • Purity of helium entry: ≤ 1% impurities
  • Flow rate: 0-50 SLPM
  • Dwell time: 2 weeks *
  • LN2 capacity: 120 liters
  • LN2 consumption: 30 liters per week *
  • Regeneration time: 12 hours
  • Regeneration interval: 2 months with 0.2% contaminations *

* at 10 SLPM helium flow


Liquid helium recovery

The ATP30 is used to supply ATL helium liquefaction systems with clean helium gas. It is used where ATLs are used, for example for the recovery of liquid helium in magnetism and cryotechnology. It is used with Quantum Design products like the MPMS and PPMS, with magnetoencephalography (MEG) systems by Elekta and with Nuclear Magnetic Resonance (NMR) systems from various suppliers. Other equipment that runs with the liquid helium from our ATLs are bath and flow cryostats of any kind for measurement methods like Atomic Force Microscopy (AFM), Scanning Tunneling Microscopy (STM), Fourier Transform Mass Spectroscopy (FT-MS), Electron Paramagnetic Resonance Spectroscopy (EPR), Cathodoluminescence, Mossbauer Spectroscopy, IR Detectors and Electron Beam Ion Traps (EBIT).

Any time the helium gas is contaminated by recovery lines that are not made from metal, a purifier should be used to clean the gas before it is fed into an ATL.


Helium liquefiers and recovery systems
Application Note High pressure recovery plant


Staffan Eriksson
Staffan Eriksson


Quantum Design GmbH

Roddarestigen 3
SE 182 35 Danderyd

Phone:+46 8 41071791
Staffan ErikssonSales Manager
+46 8 410 71791
Write e-mail