42 CFR 84.137
§ 84.137 Inhalation and exhalation valves; check valves; minimum requirements.
United States · 42 CFR — Public Health · Status: effective
Cite this
- Citation
- 42 CFR 84.137, § 84.137 Inhalation and exhalation valves; check valves; minimum requirements, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/201750
- Permanent ID
ys:prov:201750@1- SHA-256
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Full text
(a) Inhalation and exhalation valves shall be provided where necessary and protected against distortion.
(b) Exhalation valves shall be:
(1) Protected against damage and external influence; and
(2) Designed and constructed to prevent inward leakage of contaminated air.
(c) Check valves designed and constructed to allow airflow toward the facepiece only shall be provided in the connections to the facepiece or in the hose fitting near the facepiece of all Type A, AE, B, and BE supplied-air respirators.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.