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What Are Some Common Problems With Valve‐Exercising Programs?
Author(s) -
Kline Pat
Publication year - 2007
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2007.tb02757.x
Subject(s) - flashing , globe valve , position (finance) , butterfly valve , closed circuit , computer science , marine engineering , engineering , electrical engineering , mechanical engineering , business , materials science , finance , metallurgy
This month's question asks about implementing a valve‐exercising program and what kinds of problems should be expected. A common problem encountered with such a program is the inability of locating a valve due to poor mapping, vegetation growth, or street maintenance. Locator options discussed include metal detectors, magnetic locators, and radio transmission units also known as line tracers. Once a valve has been located, the article recommends recording several factors such as location, bury depth, pipe material, valve material, valve diameter, normal valve position (open, closed), and the correct direction the valve should be turned. Cavitation and flashing are also discussed.