Helium leak test
Among its continuous services RÖSSEL-Messtechnik
offers a new one in order to support their clients.
The tightness of construction elements
or equipment depends on the purpose they suit and on the leakiness allowed with
There is no absolute tightness. A
component is considered to be technically tight, in case if the leakiness
remains under the limit fixed for this component.
In order to grasp the leakiness quantitatively, the
term „leak rate“ was introduced (as symbol “gL”). For the vacuum technology,
the leak rate unit was determined as (mbar*L)/s. The leak rate value is 1
mbar*L/s if in a vacuum - reservoir with a volume of 1 Litre
the pressure rises in 1 Second about 1 mbar or in a pressure –
reservoir it drops about 1 mbar.
The leak rates which are permissible in practice (from
agreed 100 (mbar*L)/s up to < 10-11 (mbar*L)/s require the use of different
tightness test methods and tightness test apparatuses.
to the establishment of entire leakiness, the leak locating is of a most
interest so that a leak can be removed purposefully and opportunely.
introduced leak detectors, you can not only find a leak purposefully but also examine
the entire leak rate of the test object.
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