Code of Federal Regulations · Section
§ 84.92 — Exhalation Valve Leakage Test
42 C.F.R. § 84.92
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(a) Dry exhalation valves and valve seats will be subjected to a suction of 25 mm. (1 inch) water-column height while in a normal operating position.
(b) Leakage between the valve and the valve seat shall not exceed 30 milliliters per minute.
Authorizing Statute
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Duties of United States Bureau of Mines30 U.S.C. § 3