Filter arrangement having at least two successive layers having

Details Filter arrangement having at least two successive layers having Filter arrangement having at least two successive layers having

1997-12-22

1999-10-19

Walker, W. L.

Liquid purification or separation

Processes

Separating

210489, 2104935, 55487, 55500, 55521, B01D 2956

Patent

active

059683732

ABSTRACT:
A filter apparatus and method wherein successive layers of filter medium are spaced apart from each other a preselected distance to create a substantially direct, in-line through-flow void space therebetween evaluated upon the porosity and thickness of the successive filter mediums, pleated spacer/filter arrangements being employed to create a combined overall filter media with an included through-flow void space for fractionated distribution of particles between the successive layers of filter medium to maximize particulate holding capacity of the overall filter media.

REFERENCES:
patent: 4322385 (1982-03-01), Goetz
patent: 4589983 (1986-05-01), Wydevan
patent: 4661255 (1987-04-01), Humann et al.
patent: 4732675 (1988-03-01), Badolato et al.
patent: 5082476 (1992-01-01), Kahlbaugh et al.
patent: 5275743 (1994-01-01), Miller et al.
patent: 5858045 (1999-01-01), Stemmer et al.
Pore size characteristics of membrane filters by bubble point and mean flow pore test; "No date available".
Air Permeability and Pore--Distribution of a Duhl-Layered Microglass Filter Medium--Kyung-Ju Choi (1994).
Pore Distributions and Permeability of Cellulosic Filtration Media--Kyung-Ju Choi; V.7, No. 1; Mar. 1994.
Permeability--Pore Size Relationship of Nonwoven Filter Media--Kyung-Ju Choi; (1995).
Prediction of Air Permeability and Pore Distribution of Multi-Layered Nonwovens--Kyung Ju Choi; V.6, No. 3 "No date available".
Fluid Flow Through Filter Media at a Differential Pressure Across Media--Kyung-Ju Choi; V.9 No. 2, Jun. 1996.

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