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Inward leakage in tight-fitting PAPRs.

Authors
Koh-FC; Johnson-AT; Rehak-TE
Source
J Environ Public Health 2011 Mar; 2011:473143
NIOSHTIC No.
20038923
Abstract
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.
Keywords
Air-purifying-respirators; Analytical-processes; Equipment-design; Equipment-reliability; Inhalation-studies; Laboratory-testing; Personal-protective-equipment; Protective-equipment; Protective-measures; Qualitative-analysis; Respiratory-protective-equipment; Statistical-analysis
Contact
Arthur T. Johnson, Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
Publication Date
20110316
Document Type
Journal Article
Email Address
artjohns@umd.edu
Fiscal Year
2011
NTIS Accession No.
NTIS Price
ISSN
1687-9805
NIOSH Division
NPPTL
Source Name
Journal of Environmental and Public Health
State
PA; MD
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