Liquid purification or separation – Processes – Separating
Patent
1994-11-04
1996-04-16
Drodge, Joseph W.
Liquid purification or separation
Processes
Separating
73 38, 73 40, 210136, 21032169, 210636, 21050036, B01D 2446, B01D 6506, G01M 304, G01N 1508
Patent
active
055079598
ABSTRACT:
A method and apparatus for wetting, flushing and performing integrity checks on encapsulated PTFE filters includes an integral filter housing (112) encapsulating a PTFE filter (114) therein. The filter housing has an inlet pipe (116), a filter outlet pipe (118), and a vent pipe (122). First controllable inlet valve (126) is coupled to the inlet pipe of the filter housing for supplying a solvent solution to pre-wet the encapsulated PTFE filter. A second controllable inlet valve (117) is also coupled to the inlet pipe of the filter housing for supplying gas from a source under pressure to check the integrity of the pre-wetted PTFE filter. A third controllable inlet valve (119) is also coupled to the inlet pipe of the filter housing for supplying a source of water to flush the pre-wetted filter after checking its integrity.
REFERENCES:
patent: 4430213 (1984-02-01), Ishikawa
patent: 4770778 (1988-09-01), Yokoyama et al.
patent: 4872974 (1989-10-01), Hirayama et al.
patent: 4874516 (1989-10-01), Kondo
patent: 5353630 (1994-10-01), Soda et al.
patent: 5417101 (1995-05-01), Weich
Advanced Micro Devices , Inc.
Chin Davis
Drodge Joseph W.
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