Control valve diameter of the selection steps
According to the process, to determine the caliber of the regulating valve, the specific steps are: 1, first of all, according to the production capacity of the equipment load calculation maximum flow Qmax and minimum flow Qmin. 2, according to the selected flow characteristics and system characteristics selected S value, and then based on pressure distribution and pipeline losses, determine the minimum pressure difference â–³ Pmin and the maximum pressure difference â–³ Pmax. 3, according to the ability to calculate the formula, get the maximum flow of Kvs. 4, according to Kvs in the selected product type standard, select more than Kvs and close to Kv value. 5, according to the selected value of Kv and flow characteristics, verify the opening of the control valve, the required opening in between 10% and 90%. 6, calculate R, check the adjustable ratio. 7, after the verification of qualified, according to Kv value to determine the caliber of regulating valve.
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