Globe valves have traditionally been the number-one choice to handle challenging control tasks. These valves have proven their worth in various industrial processes, from complex chemical applications to the simple control of a heating circuit. However, a wide range of alternatives is available, such as ball-, butterfly-, rotary plug-, segmented ball-, gate- and plug valves. When taking a closer look, considerable differences between the various valve designs become evident. Fig. 1 provides an overview of the different valve types that are used to control process media in industrial processes. The illustration shows the average flow coefficients at maximum valve opening (K_(vs) coefficients) specified in manufacturer catalogs for valves in sizes up to NPS 10/DN 250.
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