gate valve

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gate valve

[′gāt ‚valv]
(mechanical engineering)
A valve with a disk-shaped closing element that fits tightly over an opening through which water passes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

gate valve, full-way valve

gate valve
A flow control device consisting of a wedge-shaped gate which can be raised to allow full, unobstructed flow or can be lowered to restrict the flow passage; not intended for close fluid flow control nor for very tight shutoff. (See illustration p. 456.)
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.