ANSI/HI 9.8-Rotodynamic Pumps for Pump Intake Design


This standard applies to the design of new intakes as well as the modification of existing designs used with rotodynamic pumps. It outlines standard intake designs based on certain criteria, beyond which requires a physical model study to be in compliance with the standard. Ideally, the flow of liquid into any pump should be uniform, steady, and free from swirl and entrained air.  Lack of uniformity through inlet connection can result in pumps not operating to optimum design condition, at a lower hydraulic efficiency and result in poor reliability. 

Those involved in the water and wastewater, process service, petrochemical service and other industries that funnel water and other liquids through intake connections to a pump would benefit from this standard.

What’s New:

This standard supersedes the ANSI/HI 9.8-2012 edition. Updates in the new edition include:

  • Addition of Purpose and Scope
  • Updated text and figures to clarify or improve existing material
  • Reorganization of standard sections
  • Addition of preferred units (metric and US customary) to nomenclature for primary symbols
  • Update to intake features that require a physical model study
  • Appendix added to provided general information regarding sediment and debris issues at intakes
  • Significant revision to the can pump section
  • Improved guidance on the use of FSI

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ANSI/HI 9.8-Rotodynamic Pumps for Pump Intake Design


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