Research Article
Dec 1971
Choking and Supercavitating Valves
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 97, Issue 12
Abstract
The occurrence of choking flow or supercavitation downstream of valves can result in unsatisfactory performance. A valve chokes when the mean pressure immediately downstream drops to vapor pressure. For a given upstream pressure, the maximum discharge through the valve has been reached. Vibrations, noise, and possibly erosion damage due to cavitation reach their peak intensity near choking. Supercavitation occurs when the entire pipe cross-section for several diameters below the valve is filled with water vapor. When this occurs, the collapse of the cavitation and thus, the vibrations, noise, and erosion potential occur remote from the valve. Information is provided from which the conditions under which a valve will choke or supercavitate can be predicted. Data are presented for ball, gate, glove, and butterfly valves in sizes from 1 in. through 16 in. The testing covered ranges of pressure from 15-260 psi. Scale effects on choking cavitation due to variations in size and pressure are negligible.
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Information & Authors
Information
Published In
Journal of the Hydraulics Division
Volume 97 • Issue 12 • December 1971
Pages: 1931 - 1945
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Dec 1971
Published online: Feb 3, 2021
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Authors
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J. Paul Tullis, M.ASCE
Assoc. Prof. of Civ. Engrg., Colorado State Univ., Fort Collins, CO, USA
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.