42 C.F.R. § 84.123 Exhalation valve leakage test.
Title 42 - Public Health
(a) Dry exhalation valves and valve seats will be subjected to a suction of 25 mm. water-column height while in a normal operating position. (b) Leakage between the valve and valve seat shall not exceed 30 milliliters per minute.
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart I—Gas Masks
§ 84.123 Exhalation valve leakage test.
