Diaphragm Valve Hydraulic Behavior Depending on Operating Pressure
Publication: Journal of Irrigation and Drainage Engineering
Volume 145, Issue 11
Abstract
In this study, a hydraulically operated and diaphragm-actuated type of diaphragm valve using an elastic diaphragm was tested. With this type of valve, the opening fraction depends on the pipeline pressure; thus, it is important to determine the minimum operating pressure. The outlet pressure was determined to be the critical pressure ensuring the full opening. The valve flow coefficient was found to be a good indicator of the valve opening fraction. A test procedure was presented to determine the minimum outlet pressure. The pressure had to be continuously increased during testing to avoid hysteresis. An unsteady valve behavior was observed after a sudden intense pressure decrease.
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Data Availability Statement
All data generated during the study are available from the corresponding author by request.
Acknowledgments
The authors thank RIS Iberia for providing the valves used in our tests.
References
Carrión, F., J. M. Tarjuelo, and D. Hernández. 2013. “Design of microirrigation subunit of minimum cost with proper operation.” Irrig. Sci. 31 (5): 1199–1211. https://doi.org/10.1007/s00271-013-0399-8.
ISO. 2008. Agricultural irrigation equipment—Pressure losses in irrigation valves—Test method. ISO 9644. Geneva: ISO.
Tullis, J. P. 1989. Hydraulics of pipelines: Pumps, valves, cavitation, transients. New York: Wiley.
Information & Authors
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Published In
Journal of Irrigation and Drainage Engineering
Volume 145 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jun 5, 2018
Accepted: Jun 26, 2019
Published online: Aug 19, 2019
Published in print: Nov 1, 2019
Discussion open until: Jan 19, 2020
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