Filtration system having prefilter and main filter

Details Filtration system having prefilter and main filter Filtration system having prefilter and main filter

1974-06-24

1976-05-04

Hart, Charles N.

Liquid purification or separation

Diverse distinct separators

Including a filter

210169, 210316, 210333R, 210416, B01D 2324

Patent

active

039546217

ABSTRACT:
A filtration system comprises a relatively thin prefilter medium and a relatively thick main filter medium, which are so related that the pore size of the prefilter medium is no greater than the pore size of the main filter medium. The purpose of the prefilter medium is to prevent premature clogging of the surface of the main filter medium. The arrangement is such that backwashing or replacement of the prefilter medium can be effected readily in order to prolong the life of the main filter medium.

REFERENCES:
patent: 3138552 (1964-06-01), Richards
patent: 3173865 (1965-03-01), Bosico
patent: 3221888 (1965-12-01), Muller
patent: 3360131 (1967-12-01), Witkowski
patent: 3513977 (1970-05-01), Bellinson
patent: 3556304 (1971-01-01), Collard
patent: 3618774 (1971-11-01), Delphia
patent: 3771664 (1973-11-01), Schrink et al.
patent: 3817381 (1974-06-01), Heskett et al.

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