Internal construction of such valves varies from manufacturer to manufacturer. One mught be able to calculate some reasonable averages, but could not confidently apply them to a specific case.
Instead, you should read the manufacturer's literature for any valve you are considering. Often it will give the Cv (or Kv) of the valve, plus a maximum recommended flow. Or maybe a table of flow rates at various pressure drops across the valve.
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Capacity Temperature Control Valve
Re: Capacity Temperature Control Valve
