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Lighter compact respirators for toxic vapor protection.

Authors
Brown-CE; Kalumuck-KM; Chahine-GL; Frederick-GS
Source
Dynaflow, Inc., Fulton, Maryland, Report No. 92003-1 1993 Jun; :1-38
Link
NIOSHTIC No.
00215701
Abstract
An attempt was made to reduce the size and weight of the canisters or elements in a respirator that remove the toxic vapors from the breathed air. The system studied involved substitution of the usual activated charcoal absorbent and its required valving with a specially selected and configured polymer absorbent material combined with bidirectional flow through the porous bed. Experiments were conducted with a high boiling point vapor typical of many toxic vapors found in industrial work places. An experimental loop which simulated the human breathing cycle was designed and constructed and a polymer absorbent test module with many fine air passage channels that simulated a section of the novel respirator was cast and used in the experimental loop. When two way oscillatory flow was compared with one way flow, a dramatic increase in breakthrough time and a decrease in the concentration after breakthrough were seen with two way flow. A parametric study conducted with a numerical simulation model indicated that using of the two way oscillating flow with polymer absorbents to substantially increase the breakthrough time for toxic vapors was feasible.
Keywords
NIOSH-Grant; Adsorbents; Respirators; Respiratory-protective-equipment; Personal-protective-equipment; Toxic-vapors; Filter-materials
Contact
Dynaflow Inc 7210 Pindell School RD Fulton, MD 20759
Publication Date
19930601
Document Type
Final Grant Report
Funding Amount
50000
Funding Type
Grant
Fiscal Year
1993
NTIS Accession No.
PB94-108123
NTIS Price
A04
Identifying No.
Grant-Number-R43-OH-03011
NIOSH Division
OEP
Source Name
Dynaflow, Inc., Fulton, Maryland, Report No. 92003-1
State
MD
Performing Organization
Dynaflow, Inc., Fulton, Maryland
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