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  2. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    Half-face air-purifying respirator with combination P100 particulate filter (magenta) and organic vapor (black) cartridge. Under 42 CFR 84, chemical cartridges and gas mask canisters are defined separately.

  3. Elastomeric respirator - Wikipedia

    en.wikipedia.org/wiki/Elastomeric_respirator

    mouth-bit respirators, which fit in the mouth with the nose pinched shut (escape only) quarter-mask or orinasal mask, covering the mouth and nose only; half-mask, from below the eyes to below the chin; fullface mask, from above the eyes to below the chin; Some elastomeric masks include one-way valves to let exhaled air out unfiltered.

  4. Respirator - Wikipedia

    en.wikipedia.org/wiki/Respirator

    Air-purifying respirators range from relatively inexpensive, single-use, disposable face masks, known as filtering facepiece respirators, reusable models with replaceable cartridges called elastomeric respirators, to powered air-purifying respirators (PAPR), which use a pump or fan to constantly move air through a filter and supply purified air ...

  5. European respirator standards - Wikipedia

    en.wikipedia.org/wiki/European_respirator_standards

    EN 14683 defines respirators for use in medical settings, [4] while European standard EN 143 defines the 'P' classes of particle filters that can be attached to a face mask, which are P1, P2, and P3. The EN 143 filters are typically used on reusable respirators, like elastomeric respirators. [5] EN 14387 is the chemical cartridge standard in ...

  6. Mechanical filter (respirator) - Wikipedia

    en.wikipedia.org/wiki/Mechanical_filter_(respirator)

    Filtering half mask, reusable elastomeric respirator with pink replaceable pancake filters and grey exhalation valve Full-face elastomeric respirators seal better. [1] Mechanical filters, a part of particulate respirators, are a class of filter for air-purifying respirators that mechanically stops particulates from reaching the wearer's nose ...

  7. Respirator assigned protection factors - Wikipedia

    en.wikipedia.org/wiki/Respirator_Assigned...

    The APF for negative pressure half mask respirators are twofold. But this difference cannot be considered separately from recommendations for use of respirators. The use of half-face masks in the US is limited to 10 PEL for the "worst case" - work in the polluted atmosphere of 8 hours per day, 40 hours a week.

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