METHOD FOR TESTING THE INTEGRITY OF A HYDROPHOBIC POROUS DIAPHRAGM FILTER
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United States of America Patent
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Issued Date -
Oct 9, 2014
app pub date -
Jun 26, 2012
filing date -
Aug 24, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for testing integrity of a hydrophobic, porous diaphragm filter (42) includes arranging the filter (42) in a non-wetted state in a test housing (30) so that the filter (42) divides an upstream housing region (30a) from a downstream housing region (30b), completely filling the upstream housing region (30a) with a test liquid that does not wet the hydrophobic diaphragm filter (42), incompletely filling a reservoir (12) that is connected to a liquid feed line (16) of the test housing (30), charging the reservoir (12) with compressed air at a constant pressure below the intrusion pressure of the filter, and determining a substance flow at the reservoir (12). The substance flow to be determined is a mass flow out of the reservoir (12) determined as a decrease in the overall weight of the reservoir (12).
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