Liquid Helium is a unique refrigerant that serves as the basis for low-temperature electrical superconductivity.
On July 10, 1908, the coldest spot on Earth appeared in the Dutch city of Leiden. On that day, a professor at Leiden University Heike Kamerlingh Onnes (Netherlands. Heike Kamerlingh Onnes) first received a small portion of liquid Helium, cooling it to a temperature of 4°K (minus 269°C). And in 1938, the journal Nature published an article by Pyotr Leonidovich Kapitsa, in which he described an amazing phenomenon: if Helium is cooled to the so-called critical temperature (in P.A.Kapitsa’s experiments it was 2.17°K, or minus 270.98°C at a pressure of 0.05 atmospheres), friction completely disappears, or, more precisely, viscosity. This was the beginning of the two most important phenomena for modern quantum physics – superconductivity and superfluidity.
Liquid Helium is a liquid state of aggregation of Helium, a colorless, chemically inert liquid, transparent and extremely difficult to distinguish with the eye due to the low refractive index of light (approx. 1.038). The most important feature of liquid Helium is its unusually low boiling point – only 4.215°K at atmospheric pressure.

Another unique property of liquid Helium is the impossibility of freezing it at a pressure of less than 2.5 MPa, even when cooled to absolute zero! By the way, solid Helium is no easier to consider than liquid helium – their refractive indices of light are very close to each other.
Finally, after cooling liquid helium to a temperature below 2.17°K (the so-called “lambda transition”), its quantum properties begin to manifest themselves: properties of superfluidity and colossal thermal conductivity.
In a liquid state of aggregation at atmospheric pressure, Helium has a very low specific gravity (only 125 kg/m³), ​​low heat of vaporization (but high heat capacity typical of Helium), and low thermal conductivity.


Scopes of liquid Helium:

  • ensuring the operation of superconducting electromagnets: in medical devices for magnetic resonance imaging (MRI), in research facilities such as particle accelerators and thermonuclear fusion units;
  • as a basis for obtaining ultra-low temperatures in scientific experiments: special methods can achieve temperatures significantly below 4.2°K (for example, by pumping out vapors, dissolving Helium-3 in Helium-4);
  • transportation of large quantities of liquefied helium for the purpose of its further gasification (due to the fact that the density of liquid helium at normal pressure is 4 times higher than the density of gaseous helium compressed to 200 atm, the transport batch can be increased).

Ingas LLC produces liquid Helium at its own facilities by deep cooling of gaseous helium on the basis of an expander refrigeration cycle.
The production of liquid Helium is carried out in accordance with the current standards of the enterprise.

NoNames of gas
and controlled impurities
Formula of an element
or chemical compounds
Gas purity
and content of its controlled impurities
(vol.%, ppmv)
Brand 5.5
1.Helium*He99.9995 об.%
2.NeonNe⩽1.0 ppmv
3.NitrogenN₂⩽1.5 ppmv
4.Oxygen + ArgonO₂+Ar⩽0.5 ppmv
5.HydrogenH₂⩽0.2 ppmv
6.Carbon monoxide + Carbon dioxideCO+CO₂⩽0.1 ppmv
7.Amount of hydrocarbonsΣCₙHₘ⩽0.2 ppmv
8.MoistureH₂O⩽5.0 ppmv
*The volume fraction of Helium is given on a dry basis.

For storage and transportation of liquid Helium, Ingas LLC uses modern special Dewar vessels, manufactured by Cryofab Inc, USA, with a capacity of 250 and 500 liters with screen-vacuum insulation, providing daily losses of liquid Helium of less than 1% from the capacity of the vessel per day.
Ingas LLC supplies liquid Helium with its own special transport with a hydraulic lift board, which allows unloading (loading) of Dewar vessels on the territory of the Customer in the absence of special technological platforms (overpasses) there. Possible delivery volume 250 ÷ 7000 liters. By agreement with the Customer, an order volume of less than 250 liters is possible.

CAS Number: 7440-59-7
UN Number: UN 1963
DOT Shipping Name: Liquid Helium; Helium, Refrigerated Liquid
DOT Classification: 2.2 (Non-Flammable refrigerated liquefied gas)