Case Study of Check-Valve Slam in Rising Main Protected by Air Vessel
Publication: Journal of Hydraulic Engineering
Volume 123, Issue 12
Abstract
Check valves usually are fitted on pump-rising main systems to prevent the development of backflow when a pump cuts out. Frequently, air vessels are used in such systems to control transient pressures resulting from pump start and stop. The presence of an air vessel adjacent to a check valve may cause the valve to close, after pump cutout, with a sharp impact, typically producing an audible valve-slam sound. The phenomenon of check-valve slam is undesirable, because it can result in damaging pressure transients. A case study of a pump-rising main system, protected by an air vessel, which experienced the problem of check-valve slam, was investigated. Both field measurements and numerical modeling (using a spreadsheet) of the system were conducted.
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References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 123 • Issue 12 • December 1997
Pages: 1166 - 1168
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Dec 1, 1997
Published in print: Dec 1997
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