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Official Manufacturer Support Threads: EKWB | Watercool | Official Subreddit Discord.In practice, if one of the pumps in parallel or series stops, the operation point moves along the system resistance curve from point 3 to point 1 - the head and flow rate are decreased. Note! In practice the combined head and volume flow moves along the system curve as indicated from 1 to 3. for two identical pumps in parallel and the head kept constant - the flow rate doubles compared to a single pump as indicated with point 2.When two or more pumps are arranged in parallel their resulting performance curve is obtained by adding the pumps flow rates at the same head as indicated in the figure below.Ĭentrifugal pumps in parallel are used to overcome larger volume flows than one pump can handle alone. Operation of single stage pumps in series are seldom encountered - more often multistage centrifugal pumps are used. the flow for each pump equals the flow at point 3.the head for each pump equals half the head at point 3.Note that for two pumps with equal performance curves running in series point 1 is where the system operates with one pump running.point 3 is where the system operates with both pumps running.
With a constant flowrate the combined head moves from 1 to 2 - BUT in practice the combined head and flow rate moves along the system curve to point 3.
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