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Modified Needle Valve Replaces Ball Valve
Author(s) -
Brixey Dennis
Publication year - 1987
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.1987.tb00473.x
Subject(s) - ball valve , globe valve , ball (mathematics) , position (finance) , activity based costing , control theory (sociology) , engineering , computer science , mechanical engineering , mathematics , artificial intelligence , control (management) , economics , mathematical analysis , accounting , finance
This article discusses how the Springfield, Mo. City Utilities solved their problem of alum application at low ranges of feed. The original PVC ball valve provided sluggish flow at low ranges, thus costing the utility $12,000 annually in wasted material. The ball valve was replaced with a needle valve which solved the feed problem but which was not compatible with the position controller. Rather than buying new position controllers the utility was able to modify the needle valve to work with its original position controller.