| 摘要 |
A process is described for producing a clean gas, which is provided, in particular, for testing a pressurized construction component (100) for leaks, which process includes the steps of providing a liquefied gas mixture (1) which contains the clean gas (2) and at least one foreign gas (3) in a gas separation unit (20), enriching the clean gas (2), wherein the at least one foreign gas (3) is transferred to a surface region of the liquefied gas mixture (1), and taking off the enriched clean gas (2), wherein the enriched clean gas (2) flows out of a volume region of the gas separation unit (20) via a guide unit (22), and wherein a foreign gas barrier (23) is formed at the guide unit (22), using which the foreign gas (3) in the liquefied gas mixture (1) is passed out from an opening in the guide unit (22). A device for producing a clean gas, a noble-gas-free gas composition and a process for testing a construction component pressurized with a test gas for leaks are also described.
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