Static Pressure Requirements for Ventilated Enclosures

Details

• Personal Author:
  Ahrenholtz E ; Cecala AR ; Heitbrink, William A. ; Organiscak, John A. ; Schmitz, Michael ; Thimons, Edward D.
• Description:
  Environmental enclosures on vehicles protect workers from pesticide exposures during air blast spraying and dust exposures during surface mining operations. One or more fans draw air through filters to remove· air contaminants and force clean air into an enclosure at some minimum static pressure. Air flows out a cab through either a baffled outlet port or leaks in the enclosure. Enclosures also have holes for electrical and mechanical connections. Because the vehicles are used in open environments, ambient wind may cause air infiltration to increase when the wind's velocity pressure, is greater than the static pressure in the enclosure. Thus, the effects of velocity pressure and enclosure static pressure upon the exposure reduction obtained by an idealized enclosure were evaluated. The results in Figures 2 and 3 are consistent with the hypothesis that contaminant penetration into an enclosure occurs when wind velocity pressure exceeds the static pressure in the enclosure. Environmental enclosure manufacturers should include enclosure static pressure and maximum ambient wind speed as equipment specifications. In their equipment manuals, manufacturers should warn that air contaminant infiltration into enclosures can increase when the enclosure is used in the presence of excessive ambient wind or when the enclosure static pressure is inadequate. Enclosures should be maintained so that adequate static pressure is maintained in the enclosure. [Description provided by NIOSH]
• Subjects:
  Agriculture Air Movements Dust Insecticides Mining Occupational Health Particulate Matter Safety
• Keywords:
  Agricultural Machinery Air Flow Air Pressure Dust Exposure Dust Particles Dusts Enclosed Cabs Mining Equipment Mining Industry Pesticides Pesticides And Agricultural Chemicals

  More +
• Series:
  Mining Publications
• ISBN:
  9789518023640
• Publisher:
  Finnish Institute of Occupational Health
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Ohio ; OSHA Region 3 ; OSHA Region 5 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DPSE - Division of Physical Sciences and Engineering ; PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  97-99
• Volume:
  2
• NIOSHTIC Number:
  nn:20020948
• Citation:
  Progress in modern ventilation. Proceedings of Ventilation 2000-6th International Symposium on Ventilation for Contaminant Control, June 4-7, 2000, Helsinki, Finland. Niemela R, Railio J, Sundquist E, Tahti E, eds. Helsinki, Finland: Finnish Institute of Occupational Health, 2000 Jun; 2:97-99
• Editor(s):
  Niemela R; Railio J; Sundquist E; Tahti E
• Federal Fiscal Year:
  2000
• Peer Reviewed:
  False
• Source Full Name:
  Progress in modern ventilation. Proceedings of Ventilation 2000-6th International Symposium on Ventilation for Contaminant Control, June 4-7, 2000, Helsinki, Finland
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ef313cbc02ac870bad017d8b7ba39cf0bf31a42f582eecd5f28bb9531ed2ab0ece6ae86979aef08b7553be228153058eb33e8dbbba99db32fb68f0529611e39f
• Download URL:
  https://stacks.cdc.gov/view/cdc/220426/cdc_220426_DS1.pdf
• File Type:
  [PDF - 703.11 KB ]