49 C.F.R. § 236.837 Valve, electro-pneumatic.
Title 49 - Transportation
A valve electrically operated which, when operated, will permit or prevent passage of air.
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart G—Definitions
§ 236.837 Valve, electro-pneumatic.