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IPR is planning to develop an indigenous Liquid Helium Refrigeration/Liquefaction Plant. So, at the end of the Liquefaction process when the Liquid Helium is Produced ...

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concentrations of greate r than 0.1% are required . A quan-titative analysis and discussion of these results will be presented in a more comprehensive paper.

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Liquid helium has a very low critical pressure (18 PSIG, 1.2 BAR where it exists as both liquid and gas) and requires very low operating pressures.

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Phys - liquid helium

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Liquid helium - Wikipedia

At standard pressure, the chemical element helium exists in a liquid form only at the extremely low temperature of −269 °C (about 4 K or −452.2 °F).