42 CFR 84.203 - 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:
[Millimeter water column height]
|Type of chemical-cartridge respirator||Inhalation||Exhalation|
|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.