A new calculator for head loss through valves and fittings is available at https://www.pipeflowcalculations.com/download.xhtml
In the new version of the calculator, a new pressure drop and resistance coefficient calculator was recently available for pressure drop calculations in pipelines containing valves and fittings.
The calculator includes 15 valves (gate, globe, ball, butterfly, ...) and 9 fittings (elbows, tees, reducers, ...)
In the new version of the calculator, the calculation of the equivalent length of the pipeline is also available, which would cause the same resistance in the flow of the pipeline, as the resistance created by the fittings and valves.
Calculation of flow coefficient Cv or Kv for flow and pressure control valves is already available in the calculator.
Head loss and pressure drop through valves and fittings
Head loss and pressure drop through valves and fittings
Pipe flow calculations - since 2000