Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Patent
1988-12-27
1989-10-10
Hastings, Karen
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
73 38, 210140, 210143, 21032169, 210636, G01N 1508, B01D 1300
Patent
active
048729744
ABSTRACT:
A membrane filter testing method comprises 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: 4384474 (1983-05-01), Kowalski
patent: 4449392 (1984-05-01), Huschke
Chemical Engineering Progress, 67, No. 5, May 1971, pp. 82-88, Hauslein: "Ultra fine filtration of bulk fluids".
Manufacturing Chemist and Aerosol News, 52, No. 2, Feb. 1981, pp. 41-45. 3411 D. Springett, "The integrity testing of sterilizing membrane filters".
Journal of Parenteral Science and Technology, 35, No. 5, Sep.-Oct. 1981.
Olson et al., "Diffusion and Bubble Point Testing of Microporous Cartridge Filters: Preliminary Results at Production Facilities".
Journal of Parenteral Science and Technology, 37, No. 4, Jul.-Aug. 1983.
Olson et al., "Diffusion and Bubble Point Testing of Microporous Cartridge Filters: Electromechanical Methods".
American National Standard Institute, F316-70, Standard Test Method for Pore Size Characteristics of Membrane Filters for use with Aerospace Fluids.
Akashi Takamichi
Fukuda Hiroshi
Hirayama Shigemitsu
Ikuta Akio
Sasaki Isao
Fujisawa Pharmaceutical Co. Ltd.
Hastings Karen
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