Date of Award

8-2026

Degree Type

Report

Degree Name

Master of Science (MS)

Department

Civil and Environmental Engineering

Committee Chair(s)

Michael C. Johnson

Committee

Michael C. Johnson

Committee

Zachary B. Sharp

Committee

Burdette Barker

Abstract

The term liquid pressure recovery factor aids in determining the flowrate through valves at the maximum flowrate under choking conditions. The pressure recovery factor can be difficult to determine for certain types of valves based on the industry standard procedure. This report looks at the current industry standard procedure and adds a procedure in the event of the industry standard not being feasible. Often it is not feasible for a testing facility to supply enough flow through the valve to reach the industry standard. The industry standard is to test the valve at the maximum flowrate with a constant upstream pressure and have the valve choking. The proposed procedure is to remove the pipe downstream of the valve and test the valves in free, or atmospheric pressure, discharge conditions.

The proposed procedure has produced values of liquid pressure recovery factor values which are similar to the industry standard. These results have helped improve the flow measurement by defining a different procedure that yields an equivalent result with a feasible test procedure for complex valves that may not be possible to choke in a laboratory environment.

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