Masters Theses


"This thesis presents an empirical study of the characteristics of a cylindrical skirted disk valve used as a flow regulating device. Holes were drilled in two separate removable cylinders, which, when respectively attached to the valve plug adapter, provided control of the flow rate. These cylinders could be moved to permit exposure of more or less flow area by means of the valve stem and crank mechanism. At the closed position of the valve no holes were available for flow within the differential pressure zone of the valve, while at the full-open position all the drilled holes were within the flow zone of the valve, permitting maximum water flow rate.

The method used in adding the holes to the cylinders was "cut and try" because the desired flow rate was already determined before any holes were drilled. In other words, holes were drilled until the desired flow rate was achieved.

The flow rate through each cylinder was established at several cylinder positions by means of the weir trough measuring device. This relationship was used to determine the valve characteristic. The valve characteristic is merely a graphical comparison of the flow rate through the valve versus the percent valve opening.

A second set of curves was plotted to find the relationship between the flow rate and the exposed flow area for each cylinder to establish a possible design criterion.

The cylindrical skirted disk plug exhibits a new and accurate approach to fluid flow control. The results of this study indicate that the experimental procedure pursued can be used to obtain desired valve characteristics"--Abstract, pages ii-iii.


Culp, Archie W., Jr.

Committee Member(s)

Scofield, Gordon L., 1925-1986
Munger, Paul R.
Pagano, Sylvester J., 1924-2006


Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering


University of Missouri at Rolla

Publication Date



vii, 43 pages

Note about bibliography

Includes bibliographical references (page 31).


© 1966 Robert W. Wagner, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Valves -- Testing
Fluid mechanics

Thesis Number

T 1836

Print OCLC #


Electronic OCLC #