Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1995-02-27
1997-01-14
Brock, Michael
Measuring and testing
With fluid pressure
Porosity or permeability
G01N 1508
Patent
active
055941613
ABSTRACT:
A method of testing the integrity of a filter element in a falter assembly includes a) wetting filter material of a filter element having an inlet side and an outlet side connected to an outlet conduit, b) subjecting the inlet side of the filter element to a gas pressure, c) measuring the pressure in the outlet conduit as a function of time, with a downstream outlet valve for the outlet conduit being closed, and d) determining whether the pressure measured at a preselected time exceeds a reference pressure by a predetermined amount, or determining whether the time required to reach a preselected pressure is shorter than a reference time by a predetermined amount.
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Randhahn Horst
Vogelman Hartmut
Brock Michael
Pall Corporation
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