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  2. High altitude breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/High_altitude_breathing...

    The TopOut mask was introduced in 2004, based on the 3M R6311 respirator facepiece. [ 31 ] [ 43 ] Of over 6500 Everest summits as of 2013, less than 100 were without oxygen.

  3. Respirator assigned protection factors - Wikipedia

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

    Example of measurement of efficiency of the respirator (in the workplace). Description: (1) personal sampling pump, (2) the cassette and the filter for determining the concentration (in the breathing zone), (3) the sampling line (from the breathing zone), (4) the cassette and the filter to determine the concentration (under a mask), and (5) the sampling line (from the mask).

  4. Scott Air-Pak SCBA - Wikipedia

    en.wikipedia.org/wiki/Scott_Air-Pak_SCBA

    Carbon composite cylinders are made up of an aluminum alloy inner shell with carbon composite wraps and epoxy resin. They have a burst pressure of 12,000 psi, 6,500 without the carbon composite wrap. [4]

  5. Elastomeric respirator - Wikipedia

    en.wikipedia.org/wiki/Elastomeric_respirator

    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. This reduces the resistance when the user is breathing out, and some find it makes the mask more comfortable. [2] It may also reduce inwards leakage. [10 ...

  6. European respirator standards - Wikipedia

    en.wikipedia.org/wiki/European_respirator_standards

    R (reusable): if the filtering half-face mask can be used for more than one working day, so it is reusable. Additional suffixes include: Anti-clogging NR masks (D). When the half mask has passed the dolomite dust test, a letter D can be added to indicate that the service life may exceed 8 h. [14] Example: FFP3 NR D. Valve.

  7. N95 respirator - Wikipedia

    en.wikipedia.org/wiki/N95_respirator

    An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.

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