Lighter Compact Respirators for Toxic Vapor Protection

Details

• Personal Author:
  Brown CE ; Chahine GL ; Frederick GS ; Kalumuck KM
• Description:
  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. [Description provided by NIOSH]
• Subjects:
  Hazardous Substances Occupational Health Personal Protective Equipment Respiratory Protective Devices Safety
• Keywords:
  Adsorbents Filter-materials NIOSH-Grant Personal-protective-equipment Respirators Respiratory-protective-equipment Toxic-vapors
• Series:
  Grant Final Reports
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Maryland ; OSHA Region 3
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-38
• NIOSHTIC Number:
  nn:00215701
• NTIS Accession Number:
  PB94-108123
• Citation:
  Dynaflow, Inc., Fulton, Maryland, Report No. 92003-1 1993 Jun; :1-38
• Contact Point Address:
  Dynaflow Inc 7210 Pindell School RD Fulton, MD 20759
• Federal Fiscal Year:
  1993
• Performing Organization:
  Dynaflow, Inc., Fulton, Maryland
• Peer Reviewed:
  False
• Start Date:
  19920930
• Source Full Name:
  Dynaflow, Inc., Fulton, Maryland, Report No. 92003-1
• End Date:
  19930329
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:bda7810e45f66735b6c170f6b53d3074b5ff29c7ddfeeba9d11300f0e660aeaefcea4c2258d78ad5c79a63f821d7c3dd37352e1ef60c697d37e4f5266b166362
• Download URL:
  https://stacks.cdc.gov/view/cdc/217834/cdc_217834_DS1.pdf
• File Type:
  [PDF - 1.61 MB ]