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Control Valve Flow Characteristics

asked Sep 5, 2014 in Process by rajprasad (870 points)

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answered Sep 5, 2014 by cobiesmith (3,310 points)
The flow characteristic of a control valve is the relationship between the flowing quantity of fluid through the valve and the valve stem travel from closed (0%) to the fully open (100%) position. Normally the relationship is represented as in Figure below, where the valve lift and capacity are stated as percentages of maximum travel and the flow coefficient of the fully open valve.

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