FIELD: filter tests. SUBSTANCE: changes of pressure drop through a filter are determined in equal time intervals when testing. Change of pressure drop and rate of pressure drop change are plotted. The tests are stopped on achieving constant rate of pressure drop change. Filter service-life is determined graphically. EFFECT: extended service-life of filters. 4 dwg, 1 tbl
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Authors
Dates
1995-12-27—Published
1993-05-14—Filed