What does flow resistance mean in practice?
They arise along the length of pipes, fittings, valves, inserts and beds, growing non-linearly with the flow.
When does it matter?
The sum of small local resistances can reduce the pressure downstream of the system despite the correct diameter of the main conduit.
Which solutions are related to it?
The entire path is analyzed, unnecessary narrowing is reduced and elements are selected from the flow characteristics.