Dual cartridge filter employing pH control

Details Dual cartridge filter employing pH control Dual cartridge filter employing pH control

1992-05-05

1994-01-11

Silverman, Stanley S.

Liquid purification or separation

With means to add treating material

Plural distinct separators

210209, 210232, 210286, 210287, 210315, 210438, 210440, 210443, B01D 3530, C02F 170, C02F 172

Patent

active

052778029

ABSTRACT:
A filter system (10) is disclosed that includes a filter assembly (12) and input/output hardware (14). The filter assembly includes a housing (16) and cap (18) that cooperatively support a prefilter (20) and main filter (22) in a fluid flow path. Fluid flow through the filter assembly occurs radially through the prefilter and axially or radially through the main filter. The main filter includes an alkaline leaching agent to raise the pH of fluid flowing therethrough to, for example, between 8 and 10. A method is also disclosed for evaluating the effectiveness of the filter system in reducing a select contaminant from the fluid by evaluating the effectiveness of the filter system in raising the fluid's pH.

REFERENCES:
patent: 4652381 (1987-03-01), Inglis
patent: 4659463 (1987-04-01), Chandler et al.
patent: 4713175 (1987-12-01), Bray
patent: 4732674 (1988-03-01), Tamura et al.
patent: 5092993 (1992-03-01), Goodwin

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