Inward Leakage in Tight-Fitting PAPRs | Zendy

Frank C. Koh | Zendy; Arthur T. Johnson | Zendy; Timothy E. Rehak | Zendy

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Inward Leakage in Tight-Fitting PAPRs

Author(s) -

Frank C. Koh,

Arthur T. Johnson,

Timothy E. Rehak

Publication year - 2011

Publication title -

journal of environmental and public health

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.869

H-Index - 35

eISSN - 1687-9813

pISSN - 1687-9805

DOI - 10.1155/2011/473143

Subject(s) - respirator , leakage (economics) , exhalation , breathing , environmental science , acoustics , computer science , simulation , materials science , anesthesia , medicine , composite material , physics , macroeconomics , economics

A combination of local flow measurement techniques and fog flow visualization was used to determine the inward leakage for two tight-fitting powered air-purifying respirators (PAPRs), the 3M Breathe-Easy PAPR and the SE 400 breathing demand PAPR. The PAPRs were mounted on a breathing machine head form, and flows were measured from the blower and into the breathing machine. Both respirators leaked a little at the beginning of inhalation, probably through their exhalation valves. In both cases, the leakage was not enough for fog to appear at the mouth of the head form.

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