42 C.F.R. § 84.122 Breathing resistance test; minimum requirements.
Title 42 - Public Health
(a) Resistance to airflow will be measured in the facepiece or mouthpiece of a gas mask mounted on a breathing machine both before and after each test conducted in accordance with §§84.124, 84.125, and 84.126, with air flowing at a continuous rate of 85 liters per minute. (b) The maximum allowable resistance requirements for gas masks are as follows:
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart I—Gas Masks
§ 84.122 Breathing resistance test; minimum requirements.
Maximum Resistance [mm. water-column height]------------------------------------------------------------------------ Inhalation Type of gas mask -------------------------- Exhalation Initial Final \1\------------------------------------------------------------------------Front-mounted or back-mounted 60 75 20 (without particulate filter)....Front-mounted or back-mounted 70 85 20 (with approved particulate filter).........................Chin-style (without particulate 40 55 20 filter).........................Chin-style (with approved 65 80 20 particulate filter).............Escape (without particulate 60 75 20 filter).........................Escape (with approved particulate 70 85 20 filter).........................------------------------------------------------------------------------\1\ Measured at end of the service life specified in Tables 5, 6, and 7 of this subpart.
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