Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Patent
1989-08-22
1991-11-12
Hastings, Karen M.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
73 38, 210140, 210143, 21032169, G01N 1508, B01D 1300
Patent
active
050645293
ABSTRACT:
A membrane filter testing apparatus uses a control circuit for increasing the pressure at the primary side of a membrane filter fixedly accommodated in a housing and wetted with a liquid, by a gas at a predetermined rate, and checking whether the pressure at the primary side of the membrane filter is within a specified judging range after lapse of a predetermined period of time.
REFERENCES:
patent: 4449392 (1984-05-01), Huschke
Akashi Takamichi
Fukuda Hiroshi
Hirayama Shigemitsu
Ikuta Akio
Sasaki Isao
Fujisawa Pharmaceutical Co. Ltd.
Hastings Karen M.
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