Breathing resistance test; minimum requirements.

(a) Resistance to airflow will be measured in the facepiece, mouthpiece, hood, or helmet of a chemical cartridge respirator mounted on a test fixture with air flowing at a continuous rate of 85 liters per minute, both before and after each test conducted in accordance with §§ 84.206 through 84.207. (b) The maximum allowable resistance requirements for chemical cartridge respirators are as follows: Maximum Resistance [Millimeter water column height] Type of chemical-cartridge respirator Inhalation Exhalation Initial Final 1 Other than single-use vinyl chloride respirators: For gases, vapors, or gases and vapors 40 45 20 For gases, vapors, or gases and vapors, and particulates 50 70 20 Single-use respirator with valves: For vinyl chloride 20 25 20 For vinyl chloride and particulates 30 45 2 Single-use respirator without valves: For vinyl chloride 15 20 ( 2 ) For vinyl chloride and particulates 25 40 ( 2 ) 1 Measured at end of service life specified in Table 11 of this subpart. 2 Same as inhalation.