Method for testing integrity of a filter medium
US11697096B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 2021 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Sep 17, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An integrity testing method for a porous medium in a housing having an interior separated by the medium into upstream and downstream portions, an inlet and an outlet communicating, respectively, with the upstream and downstream portions, the outlet connected to a closeable conduit, comprises filling the downstream portion and conduit with liquid, draining the upstream portion and filling it with gas while retaining liquid in the downstream portion, connecting a gas-filled testing volume to the downstream portion, maintaining gas pressure of a predetermined testing differential pressure in the upstream portion, the differential pressure being lower than a predefined bubble point of the medium, determining the pressure in the testing volume, the testing volume selected such that, when a medium is tested having a bubble point corresponding to the predefined bubble point, a pressure increase within the testing volume of about 100 mbar or more is obtained within 10 minutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.