During the selection of control valves, is it necessary to consider artificially increasing the valve resistance in order to achieve better flow characteristics?
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As shown in the screenshot, it becomes clear that only when the resistance of the control valve accounts for a larger proportion of the total resistance in the piping system can its flow characteristics be made as close to equal percentage as possible. But is it really necessary to deliberately increase the resistance of the control valve in practical applications?
During the selection of control valves, it is indeed necessary to consider the resistance matching between the control valve and the entire piping system in order to achieve optimal control performance and flow characteristics. Typically, the design and selection of control valves are such that a certain proportion of resistance exists within the system, which helps to improve the accuracy of regulation and the stability of flow control. However, it is not recommended to deliberately increase the resistance of the control valve. If the resistance of the control valve itself is not sufficient to achieve good flow characteristics, this usually indicates that the selection may be inappropriate. The valve models and specifications that better meet the system’s requirements should be re-evaluated and selected, rather than attempting to improve performance by increasing resistance. The appropriate approach is to select a control valve that can operate effectively within the expected pressure drop and flow rate ranges, based on the specific requirements and operating conditions of the system. This may involve comprehensive dynamic simulation analysis of the system to ensure that the selected control valve can meet the performance requirements under actual operating conditions. .