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Have you tried unplugging it? - v.05a
1. Plug Valves and Other
Flow-Stoppers
Brian Gongol, M.Ed.
DJ Gongol & Associates, Inc.
August 24, 2022
Iowa Section AWWA Fall Short Course
Ankeny, Iowa
2. Why do we use isolation valves?
• Mostly for protection during maintenance and service
• Sometimes for throttling service
20. Valve length
• Switching from long to short may require
expansion joints or fabricated pipes
• Switching from short to long may require
field modifications
42. Serviceability
Easy to service Medium effort Hard to service
Rectangular-port plug valves
Round-port plug valves
Pinch valves
Gate valves
Cast knife-gate valves
Two-piece knife-gate valves
Butterfly valves
59. Suction service
Keeps air out Needs a close eye Likely to let air in
Rectangular-port plug valves
Round-port plug valves
Pinch valves
Gate valves
Cast knife-gate valves
Two-piece knife-gate valves
Butterfly valves
62. Questions?
• Thanks for your time and
attention!
• This presentation can be
found at
gongol.net/presentations
• Brian Gongol
DJ Gongol & Associates
• 515-223-4144
• brian@gongol.net
• @djgongol on LinkedIn,
Twitter, and Facebook
63. Credits
• A limited number of stock images and icons were
automatically inserted by PowerPoint
• All other images (including all product-specific and project
site photos) are the original work of the author
• Copyright 2022 by Brian Gongol, all rights reserved