Effect of Engineered Surfaces on Valve Performance

Performance of air operated valves is a major maintenance concern in process industries. Anecdotal information indicates that reliability of some high maintenance valves has been improved by using an ion deposition process to achieve engineered surfaces on selected components. This project compared friction for various surface treatments of selected valve components. Results indicate valve performance may be slightly more consistent when an engineered surface is applied in the valve packing area; however surface treatment in this area does not appear to have a dominant affect on reducing valve friction. Results indicate a linear relation between stem friction and torque applied to packing flange nuts, and even after a valve is in service, controlled packing adjustments can be made without significantly changing valve stroke time.

Grantor dc:publisher

University of North Texas

Year dc:date

2000

Author dc:creator

• Pope, Larry G.

Contributors dc:contributor

• Plummer, Mitty C.
• Foster, Phillip R.
• Johnson, J. Lynn
• Hopkins, Daniel N.
• Grubbs, Albert B.

• Valves.
• Metals -- Surfaces.
• process industries
• valves
• Ion deposition
• stem friction
• Ion plating

Statement dc:rights

• Use restricted to UNT Community
• Copyright
• Pope, Larry G.
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 50547302
https://digital.library.unt.edu/ark:/67531/metadc2670/
ark: ark:/67531/metadc2670

OAI identifier oai:identifier

info:ark/67531/metadc2670