What are the steps to determine the valve diameter?

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  1. Determine the calculated flow rate (max and min).
  2. Determine the calculated pressure difference - select the resistance ratio value according to the characteristics of the system, and then determine the pressure difference (valve is fully open).
  3. Calculate the flow coefficient - select the appropriate calculation formula chart or software to find the max and min of KV.
  4. KV value selection.
  5. Check the opening degree.
  6. Actual adjustable ratio.
  7. Determine the valve diameter - if unqualified, re-select KV value, and then verify.