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1、TechnicalDataBulletinNumber118,January1996SELECTIONOF42CFR84APPROVEDPARTICULATEFILTERS:NIOSHUSER’SGUIDE_____________________________________________________________________OnJune8,1995,theNationalInstituteforOccupationalSafetyandHealth(NIOSH)publishedanewregulation(42CFR84)forcertifyingair-

2、purifying,particulatefilter1respirators.Thisrulerevisedtestrequirementsofparticulatefilterrespiratorsandprefiltersforgasandvaporrespiratorsresultinginninenewclassesoffilters.Thenewrulewasmorecompletelydescribedin3MRegulationUpdate#18.Thenewclassesofparticulatefiltersrequireanewsetofselectio

3、ncriteriainordertoselecttheproperrespirator.Verylimitedfilterselectioninformationwasprovidedin42CFR84.Recently,NIOSHpublishedaUser’s2GuidetoSelectionandUseofParticulateRespiratorstoprovideguidanceintheareaofselection.TheUser’sGuideissummarizedinthisTechDataBulletin._________________________

4、____________________________________________42CFR84FiltersTable1summarizessomeofthetestrequirementsanduselimitationsforthethreeseriesoffiltersthatimpactfilterselection.Therearethreelevelsoffilterefficiencyineachfilterseries;95,99,and100(99.97)%whentestedagainsta0.3µmmassmedianaerodynamicdia

5、meter(MMAD)testaerosol.Table1.FilterTestDescriptionandUseLimitationsAFilterSeriesTestAerosolMaximumUseServicetimeLoadingBN-SeriesNaCl200mgNon-oilaerosolsNonspecificCR-SeriesDOPoil200mgAllaerosolsOneworkshiftP-SeriesDOPoilStabilizedAllaerosolsNonspecificefficiencyASeeServiceTimeDiscussionBNa

6、Cl=SodiumChlorideCDOP=DioctylPhthalateThefollowinguselimitationsapplytoallparticulatefilterrespirators.•Notforuseinatmospherescontaininglessthan19.5%O2•Notforuseinatmospheresimmediatelydangeroustolifeorhealth•Donotexceedmaximumuseconcentrationsestablishedbyregulatorystandards(i.e.,APFXPEL)•

7、Followthemanufacturer’sinstructionsforchangingcartridgesand/orfilters(forreplaceablefilterrespirators)Obviouslythisinformationisnotcompleteenoughtomakeappropriateparticulaterespiratorselection.ToanswertheseconcernsNIOSHpublisheda“UsersGuide”toattempttopr