Filter assembly for gas analyzers

Details Filter assembly for gas analyzers Filter assembly for gas analyzers

B - Operations, Transporting

01

D

B01D 46/02 (2006.01) F01N 3/021 (2006.01) G01N 1/22 (2006.01) G01N 33/00 (2006.01) F01N 13/02 (2010.01) G01N 1/24 (2006.01) F01N 7/02 (2006.01)

Patent

CA 2090320

2090320 9204100 PCTABS00011 A filter assembly (100) for preparing gases for an exhaust gas analyzer has a single housing (101) including at least three filter cavities (103), (105) and (107), an inlet passage (180) and two outlet passages, (284) and (182). First filter cavity (103) includes a coarse filter, (121) through (125), for filtering particulate matter and for condensate condensation, with condensate draining into second filter cavity (105), which has disposed therein a fine filter (141), (142), for filtering condensate. Outlet passage (284) connected to second filter cavity (105) allows withdrawal of the condensate. Third filter cavity (107) has a fine filter (160) for filtering the exhaust gas and is coupled to first filter cavity (103). Second outlet passage (182) connects the third filter cavity (107) to a pump for removal of the gas to be analyzed. A multiple filter assembly in a single housing with large fine filter area, minimal void volume, minimal interconnections, and convenient access to the individual filters is provided, which achieves precise filtration of gases for analysis.

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