A Unifying Method for Sizing Throttling Valves Under Laminar or Transitional Flow Conditions

[+] Author and Article Information
H. D. Baumann

H. D. Baumann Assoc., Ltd., Portsmouth, NH 03801

J. Fluids Eng 115(1), 166-169 (Mar 01, 1993) (4 pages) doi:10.1115/1.2910101 History: Received October 11, 1991; Online May 23, 2008


The mass flow passing through a given valve will decrease in Reynolds number ranges below approximately 10,000 due to the transition from fully developed turbulent to laminar flow. The objective of this study is to provide a uniform prediction method to establish, with reasonable accuracy, the ratio between the turbulent and transitional or laminar flow rate passing through a given valve, taking into account the valve’s hydraulic diameter and the initial turbulent velocity head loss coefficient. Experimental data from prior research tends to support a proposed “unified sizing method” that is applicable for all single-stage valves regardless of size or type.

Copyright © 1993 by The American Society of Mechanical Engineers
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