Apparatus for measuring the decontamination factor of a multiple

Details Apparatus for measuring the decontamination factor of a multiple Apparatus for measuring the decontamination factor of a multiple

1985-07-03

1986-10-28

Myracle, Jerry W.

Measuring and testing

With fluid pressure

Porosity or permeability

G01N 1508

Patent

active

046191364

ABSTRACT:
An apparatus for measuring the overall decontamination factor of first and second filters located in a plenum. The first filter separates the plenum's upstream and intermediate chambers. The second filter separates the plenum's intermediate and downstream chambers. The apparatus comprises an aerosol generator that generates a challenge aerosol. An upstream collector collects unfiltered aerosol which is piped to first and second dilution stages and then to a laser aerosol spectrometer. An intermediate collector collects challenge aerosol that penetrates the first filter. The filtered aerosol is piped to the first dilution stage, diluted, and then piped to the laser aerosol spectrometer which detects single particles. A downstream collector collects challenge aerosol that penetrates both filters. The twice-filtered aerosol is piped to the aerosol spectrometer. A pump and several valves control the movement of aerosol within the apparatus.

REFERENCES:
patent: 4055075 (1977-10-01), Allan et al.
patent: 4515007 (1985-05-01), Herman

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