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Title: The Fluid Data User Friendly Calorimeters And Process Chromatographs For Energy Measurement Systems
Author(s): [Not Available]
Source: 1984 Appalachian Gas Measurement Short Course
Year Published: 1984
Abstract: Once the valve configuration and flow characteristic are selected, the control valve can be sized for capacity. Sizing is exactly what the name implies it is the process whereby you select the valve size (capacity) best suited to control your process. You can calculate the valve capacity required after determining the maximum and minimum flow rates of the system and the pressure drops at each flow rate. Capacities are listed in all manufacturers literature. They are expressed in gallons per minute at 1 psi differential pressure for liquids, or in standard cubic feet per hour at 1 psi differential pressure for gases. The sizing coefficient is expressed as Cv for liquids and Cg for gases. Some manufacturers do not use a specific coefficient for gases. Instead, they employ a conversion method to handle compressiblefluids using the liquid flow sizing coefficient Cv.

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