Code of Federal Regulations · Section

§ 84.157 — Airflow Resistance Test; Type C Supplied-air Respirator, Pressure-demand Class; Minimum Requirements

42 C.F.R. § 84.157

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(a) The static pressure in the facepiece shall not exceed 38 mm. (1.5 inches) of water-column height.

(b) The pressure in the facepiece shall not fall below atmospheric at inhalation airflows less than 115 liters (4 cubic feet) per minute.

(c) 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.

42 C.F.R. § 84.156 42 C.F.R. § 84.158

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