Respirators protect workers from harmful particulates, vapors and gases.
Usage of repiratory equipment must conform to OSHA regulations.
Major Classifications of Respirators
Class 1: Air Purifying Device
Class 2: Atmosphere-Supplying Respirator or Supplied Air Respirator (SAR)
Class 3: Combination Air-Purifying and Atmosphere-Supplying Device
Self-Contained Respirator Types
Used when the air space has particulates like smoke, dust, mold spores, and asbestos. HEPA filters only filter out particles and have no effect on filtering gasses from chlorine bleach and other chemical sprays and gasses.
Used to filter out harmful gasses such as chlorine bleach, acid-based products used in cleaning and etching as well as other corrosive gasses.
Ideal for protection when spraying disinfectants, solvents, gas vapors (non- corrosive), painting fumes, and encapsulates. Most commonly used filter for water and fire restoration.
Provides all the protection from an organic filter with added dust protection for longer life in dust and small airborne particle environments.
With the NIOSH 42 CFR 84 Standard, nine new 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 99.7% against the most difficult size particle to filter.
These filters are restricted to use in those atmospheres free of oil aerosols. They may be used for any solid or liquid airborne particulate hazard that does not contain oil. Generally these filters should be used and reused subject only to considerations of hygiene, damage, and increased breathing resistance.
N95 Particulate Filter:
At least 95% filter efficiency when tested with ~0.3 μm NaCl aerosol.
N99 Particulate Filter:
At least 99% filter efficiency when tested with ~0.3 μm NaCl aerosol.
N100 Particulate Filter:
At least 99.7% filter efficiency when tested with ~0.3 μm NaCl aerosol.
Filters intended for removal of any particle including oil-based liquid aerosol. They may be used for any solid or liquid airborne particulate hazard. 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 lease 95% filter efficiency when tested with ~0.3 μm DOP (Dioctyl Phthalate) aerosol.
Intended for removal of any particle including oil-based liquid aerosols. They may be used for any solid or liquid particulate airborne hazard. NIOSH recommends that respirator manufacturers establish time use limitations for all P-series filters.
P-Series filters should be used and reused for no more than more 40 hours of use or 30 days, whichever occurs first, in atmospheres 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 non-oil aerosol, P-series filters should be used and reused subject to conditions of hygiene, damaged, and increased breathing resistance.
P95 Particulate Filter:
At least 95% filter efficiency when tested with 0.3 μm DOP (Dioctyl Phthalate) aerosol.
P100 Particulate Filter:
At least 99.7% filter efficiency when tested with 0.3 μm DOP (Dioctyl Phthalate) aerosol.
Cleaning and Storage Procedures for Reusable Respirators
Respirators must be inspected before each use to ensure good operating condition.
The facepiece must be repaired or replaced if there are damaged or defective parts. The following inspection procedure is suggested:
Cleaning and storage is recommended after each use.
Alcohol wipes may be used as an interim method in the cleaning schedule for individually assigned respirators, but they must not be the only method in place. During fit testing, wipes may also be used between employees being tested. However, these respirators must be thoroughly cleaned at the end of each day, using procedures in OSHA appendix B-2 of 29 CFR 1910.134.
To Clean and Disinfect