A question about instruments
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The nameplate of the control valve indicates the term ‘flow capacity’. What does this mean? Does it refer to the flow rate? However, there is no unit associated with the numerical value. If anyone knows, please let me know. Thank you
The flow capacity Cv is one of the main parameters for selecting control valves. The flow capacity of a control valve is defined as the volume of fluid that passes through it per hour, when the valve is fully open, with a pressure difference of 0.1 MPa across it and a fluid density of 1 g/cm3. This value is known as the flow capacity, or flow coefficient, and is denoted by Cv. Its unit is t/h. The Cv value for liquids is calculated using the following formula. By referring to a table based on the value of the flow capacity Cv, it is possible to determine the nominal diameter DN of the control valve.