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Dust Mask, Respirators & Confined Space Equipment

Filter Classifications

With the NIOSH 42 CFR 84 Standards, nine classes of filters (three series of filters with three levels of filter efficiency) were developed. The series are referred to as N, R, and P. The three different levels of efficiency are 95%, 99% and 99.97%, against the most difficult to filter. N-Series Filters are restricted to use in those atmosphere free of oil* aerosols and can be used for solid or liquid airborne particulate hazards that do not contain oil*. These filters should be used or reused only with consideration of damage, hygiene, or increased breathing resistance.

N95 Particulate Filter – At least 95% filter efficient when tested with ~0.3 um NaCl aerosol.
N99 Particulate Filter – At least 99% filter efficient when tested with ~0.3 um NaCl aerosol.
N100 Particulate Filter – At least 99.97% filter efficient when tested with ~0.3 um NaCl aerosol.

R-Series Filters are intended for removal of any particle including oil*-based liquid aerosols and can be used for solid or liquid airborne particulate hazards. If the atmosphere contains oil*, the R-series filter should be used only for a single shift (or up to 8 hours continuous or intermittent use)..

R95 Particulate Filter – At least 95% filter efficient when tested with ~0.3 um DOP (Dioctyl Phthalate) aerosol..

P-Series Filters are intended for removal of any particle including oil*-based liquid aerosols and can be used for any solid or liquid particulate airborne hazard. NIOSH recommends that respirator manufacturing establish time use limitations for all P-series filters. P-series filters can be used and/or reused for no more than 40 hours of use or 30 days, whichever occurs first, in atmosphere that contain oil* aerosols unless the filter needs to be changed for hygiene reasons, is damaged, or becomes difficult to breathe through before the time limit is reached. When used in atmospheres containing nonoil* aerosol, P-series filters should be used and reused subject to conditions of hygiene, damage and increased breathing resistance..

P95 Particulate Filter – At least 95% filter efficient when tested with ~0.3 um DOP (Dioctyl Phthalate) aerosol.
P100 Particulate Filter – At least 99.97% filter efficient when tested with ~0.3 um DOP (Dioctyl Phthalate) aerosol..

* Oil: Mineral, vegetable and synthetic substances and animal and vegetable fats that are generally slippery, combustible, viscous, liquid or liquefiable at room temperatures, soluble in various organic solvents such as ether, but not in water.
Full Face Respirator
Low-Maintenance (Air-Purifying) Respirators
Half Mask Respirators
Half Mask Respirators
N95 Particulate Respirator
N95 Particulate Respirator
N95 Particulate Respirator With Exhalation Valve
N95 Particulate Respirator With Exhalation Valve
Nuisance Dust Mask
Nuisance Dust Mask
P100 PARTICULATE RESPIRATOR
P100 RESPIRATOR
R95 Particulate Respirators
R95 Particulate Respirators
Replacement Cartridge, Filters and Accessories
Replacement Cartridge, Filters and Accessories