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pressure-reducing valve, reducing valve
2. A valve that maintains a predetermined pressure by means of an automatic valve controller.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
pressure-relief valve (PRV)
i. In pneumatic and oxygen systems, the valve that ensures that the pressure of air or oxygen entering the working system is reduced to the correct value.
ii. A valve that returns the fluid to the reservoir or manifold if its pressure rises above the predetermined value. See pressure regulator.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved