a. A ventilating device, such as an opening in a wall or door; usually placed at the return of a split of air to govern the amount of air entering that portion of a mine. Kentucky
b. A device for creating shock loss to restrict passage of air through an airway. Regulators are usually set in doors as adjustable, sliding partitions that can be varied to the desired opening. In their simplest form, for temporary service in an untraveled part of a mine, regulators consist of doors propped partially open. Where possible, regulators are located on the exhaust side of a split (in a return airway) to minimize interference with traffic. See also: ventilation Syn: ventilation regulator
Source: Dictionary of Mining, Mineral, and Related Terms

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