Regarding the adjustment of the opening degree of pipeline valves, is this considered valve resistance? And how should the flow velocity be determined?
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Regarding the adjustment of the valve opening in pipelines: when the valve opening is reduced, the normal flow velocity in the pipeline increases, while when the valve opening is increased, the normal flow velocity decreases. Based on the resistance formula P=ζ *ρ* (v2/2), should the value of v in this formula be the flow velocity after the valve opening is increased, the flow velocity after it is reduced, or the flow velocity before any adjustment is made?
Dear poster, may I ask how to calculate the flow velocity of the medium at the regulating diameter of the control valve?
This post was last edited by lang2006 on 2018-9-28 09:08. Regarding the operating conditions in the table, could those who are familiar with this area provide the flow rate? Please also include the calculation process. Thank you!