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Keys to Using Pumps in Series

Cornell
Cornell KEYS TO USING PUMPS IN SERIES (1)

Keys to Using Pumps in Series

Possible Reasons/Scenarios in Which to Use Pumps in Series:

  • When a wide range of flow is required
  • When the pumps discharge into a common manifold
  • When the system head requirement is greater than can be supplied by one pump
  • When system pressure requirements vary

Keys to using pumps in series:

  • Same flows, heads are additive
  • Not limited to identical pumps
  • Continuously rising curves are best
  • Check literally everything (seal limits, pump pressure limits, etc.)

Possible Advantages:

  • Maintain high pump efficiency with greatly varying heads
  • May be able to use some present equipment
  • Space pumps throughout system
  • Reduces pipe pressures
  • Reduces axial load

Possible Disadvantages:

  • Multiple pumps may be more expensive
  • Larger pumps may offer higher efficiency at design point
  • More accessory equipment required

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