1980•American Industrial Hygiene Association JournalRequires access

Respirator protection factors: part II — protection factors of supplied-air respirators

A Hack, O.D. Bradley, Andrés Miniguano–Trujillo

Abstract

Protection Factors provided by 25 NIOSH approved supplied-air respirators were determined while the devices were worn by a panel of test subjects anthropometrically selected to represent adult facial sizes. Polydispersed DOP aerosol was used for respirator fit tests on continuous flow, demand, and pressure-demand respirators. Based on facepiece leakage measurements it appears that demand-type respirators should neither be used nor approved. The highest level of protection was provided by pressure-demand devices.

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Key concepts: Respirator, Environmental science, Automotive engineering, Engineering, Materials science, Composite material