§84.157. Airflow resistance test; Type C supplied-air respirator, pressure-demand class; minimum requirements.
42 C.F.R. § 84.157
The static pressure in the facepiece shall not exceed 38 mm. (1.5 inches) of water-column height.
The pressure in the facepiece shall not fall below atmospheric at inhalation airflows less than 115 liters (4 cubic feet) per minute.
The exhalation resistance to a flow of air at a rate of 85 liters (3 cubic feet) per minute shall not exceed the static pressure in the facepiece by more than 51 mm. (2 inches) of water-column height.
Notes, amendments, and revision history
Authority
Authority: 29 U.S.C. 651 et seq.; 30 U.S.C. 3, 5, 7, 811, 842(h), 844.
Source
Source: 60 FR 30355, June 8, 1995, unless otherwise noted.