Theory Bites: System Curves: Pumps In Series

Engineering & Design
Theory Bites_ System Curves_ Pumps In Series

Theory Bites: System Curves: Pumps In Series

Theory bites are a collection of basic hydraulic theory and will touch upon pump design and other areas of pump industry knowledge.

Pumps can be arranged and connected in series or parallel to provide additional head or flow rate capacity.

When two (or more) pumps are arranged in series they are resulting pump performance curve is obtained by adding their heads at the same flow rate as indicated in the figure below.

Centrifugal pumps in series are used to overcome larger system head loss than one pump can handle alone:

  • For two (2) identical pumps in series the head will be twice the head of a single #pump at the same flow rate – as indicated with point 2.

With a constant flow rate, 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.

  • Point 3 is where the system operates with both pumps running
  • Point 1 is where the system operates with one pump running

Note that for two pumps with equal performance curves running in series:

  • The head for each pump equals half the head at point 3
  • The flow for each pump equals the flow at point 3

Source: Engineering ToolBox

Read more Theory Bites!

Related Articles

Related Whitepapers

Impeller Selection Guide for Submersible Pumps

When selecting a submersible pump model, the question may arise of what type of impeller is best for the application. Many manufacturers offer a variety…

The AVANT™ MQ Series Brochure

The AVANT™ MQ Series is a new line of submersible pumps developed by Tsurumi Pump, an industry leader in submersible pumps for over 95 years.…

Blackmer® MAGNES Series Sliding Vane Pumps Solve Legacy Pain Points

Introduction There are some things you just can’t avoid: death, taxes, and a pump’s common operational pain points- leaks, dry run, solids handling, cavitation-causing NPSH…

Buffer & Barrier Fluids

Author: Mark Savage, FSA Member As operators of pumping equipment become more focused on the safety, reliability and environmental impact resulting from shaft seal leakage,…

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Sign up for our Newsletter


By submitting this form, you are consenting to receive marketing emails from: Empowering Pumps & Equipment, 2205-C 7th Street, Tuscaloosa, AL, 35401, http://www.empoweringpumps.com. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact