42 C.F.R. § 84.203

Current through November 30, 2024

Section 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:

Maximum Resistance

[Millimeter water column height]

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)

¹ Measured at end of service life specified in Table 11 of this subpart.

² Same as inhalation.

42 C.F.R. §84.203