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  • Users: STrunk
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  1. STrunk

    Parallel Pump Operation - friction loss

    For pumps in parallel operation, do I calculate the combined flow at the point of force main connection? For example: Assume Pump "A" has 75 gpm, Pump "B" has 50 gpm. Based on the attachment, does Pump "B" see the friction head loss of 50 gpm @ 100 ft. of fm length + 125 gpm (50+75) @ 500 ft...
  2. STrunk

    Friction loss in force main (TDH calculation)

    Do I take into account friction loss (part of total dynamic head) on downhill sections of a force main?
  3. STrunk

    Check valves at force main connection of 4" and 14" lines

    We are proposing to connect a 4" force main to an existing 14" force main. Based on old design plans, the 14" force main is operating at 1,600 GPM @ 216' TDH (two submersible 130 HP pumps). Our proposed lift station will operate at 100 GPM @ 50' TDH. We are proposing to add two check valves...

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