{"data":{"id":"us/30-cfr-57.14114","jurisdiction":"us","citation":"30 CFR 57.14114","heading":"Air valves for pneumatic equipment.","body":"A manual master quick-close type air valve shall be installed on all pneumatic-powered equipment if there is a hazard of uncontrolled movement when the air supply is activated. The valve shall be closed except when the equipment is being operated.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES","Subpart M—Machinery and Equipment"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"b67d31d65919ab2b26389f86ef96f5cd3ce395131ca7026e7beb46c43ef3b4c7","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-57.14113","next":"us/30-cfr-57.14115"},"notice":"GroundRules: Original legal text. Not legal advice."}