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Ask The Experts"Ask The Experts" is moderated on ControlGlobal.com by noted process control authority and CONTROL Columnist Bela Liptak. Liptak either answers the questions himself, or brings in one or more experts from his cadre of co-authors that worked with him on the Instrument Engineers' Handbook, Fourth Edition. Save yourself the hefty consulting fees by getting the answers to your questions here.

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Ask The Experts: Maximum rangeability of linear valves

A question about a pressure-independent balancing and control valve prompts an expert dissection of rangeability.

Aug 22, 2016

*Q: *I happened to read your article, “Rangeability of equal-percentage control valves” (Sept. 2013, p. 102). It was informative and crystal clear as to what rangeability for =% control valves means. This is the first time my mind was getting clear on this subject as I was reading sentence by sentence. Thanks so much, but I also need some of the same information for linear control valves.

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