Nondestructive testing of HEPA filters

Details Nondestructive testing of HEPA filters Nondestructive testing of HEPA filters

1978-11-27

1980-07-22

Sever, Frank

Gas separation

Means within gas stream for conducting concentrate to collector

73 38, B01D 4610, B01D 4652, B01D 4654

Patent

active

042137683

ABSTRACT:
Method is provided for non-destructively testing the integrity of a high efficiency particulate air filters using conventional equipment with a novel testing medium comprising an aerosol of hydrophobic-surfaced particles, which is non-toxic, efficient in measuring filter integrity, unaffected by moisture and temperature conditions and non-coating of optics used in measuring, whereby more accurate measuring of HEPA filter condition is realized.

REFERENCES:
patent: 2848421 (1958-08-01), Forest
patent: 3395514 (1968-08-01), Bub
patent: 3438179 (1969-04-01), Jouault
patent: 3757499 (1973-09-01), Scott
patent: 3853989 (1974-12-01), Conn et al.
patent: 3960001 (1976-06-01), Hayes
patent: 4055075 (1977-10-01), Allan et al.
patent: 4132536 (1979-01-01), Andersen

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