Powered air-purifying particulate respirator filter penetration by DOP aerosol.
American Industrial Hygiene Conference and Exposition, May 20-25, 2000, Orlando, Florida. Fairfax, VA: American Industrial Hygiene Association, 2000 May; :56-57
With the inception of 42 CFR 84, the old 30 CFR 11 regulations for nonpowered, air-purifying particulate respirators were replaced with new, more demanding certification requirements. However, the updated 42 CFR 84 regulations only changed the requirements for negative-pressure particulate respirators. The certification requirements for powered air-purifying respirators (PAPRs), were copied directly from 30 CFR 11 without any major changes. PAPR filters are still certified based on their performance using the silica dust test. An alternative testing protocol to the silica dust test was evaluated. Approved PAPR filters were tested against the updated 42 CPR 84 criteria to compare PAPR filter performance with that of newly approved negative-pressure particulate filters. High-efficiency PAPR filters from different manufacturers were tested using a new TSI Model 8122 Automated Respirator Tester. The 8122 tester produces a liquid dioctyl phthalate (DOP) aerosol that meets the requirements set forth in 42 CPR 84. New PAPR filters were tested against "neutralized" and "non-neutralized" DOP aerosols. All of the tests were run eight hours a day for at least four days, and each test incorporated a weekend where the filter was untouched. Two manufacturers' filters never exceeded the 0.03% penetration threshold, while the third manufacturer's filters did exceed 0.03% penetration, but only after loadings of approximately 12,000 mg DOP. The results from these tests were compared with Dew 42 CPR 84-certified P100 electrostatic filters that were tested on the TSI 8122 in the same fashion. When possible, these results were compared with results obtained from TSI 8110 and TSI 8130 instruments, which are used for 42 CFR 84 certification. All PAPR filters certified by the silica dust test met the current requirements for P100 negative-pressure particulate filters and maintained a 99.97% filter efficiency level up to high DOP loads. Thus, this testing protocol may be an alternative to the current silica dust test.
Respirators; Air-purifying-respirators; Respiratory-protective-equipment; Regulations; Air-pressure; Particulates; Equipment-reliability; Performance-capability; Personal-protective-equipment; Filters; Silica-dusts; Testing-equipment; Materials-testing; Laboratory-testing; Aerosol-particles; Aerosols; Electrostatic-filters
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American Industrial Hygiene Conference and Exposition, May 20-25, 2000, Orlando, Florida