42 CFR § 84.203
Breathing resistance test; minimum requirements
June 11, 2020
(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]
Open Table
| Type of chemical-cartridge respirator | Inhalation | Exhalation | |
|---|---|---|---|
| Initial | Final1 | ||
| 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) |
1Measured at end of service life specified in Table 11 of this subpart.
2Same as inhalation.
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