• Rotodynamic Pump Efficiency Prediction (HI 20.3-2015 - secure PDF)

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Item #: B135e
Member Price: $37.50
Non-member Price: $50.00

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Description  more details

Scope of Standard: ANSI/HI 20.3 presents a simplified method to predict normally attainable efficiency levels at the best efficiency point for selected types of rotodynamic pumps when the rate of flow, total head per stage, net positive suction head available (NPSHA), and the service conditions are known. The standard provides guidelines on the following pump types:

  • Slurry, end suction
  • Solids-handling, end suction pumps
  • Submersible sewage, end suction
  • Stock, end suction
  • Horizontal multistage, axial split, segmented ring diffuser barrel
  • ASME B73, API end suction, end suction – small
  • End suction – large (greater than 0.3 m3/s (5000 gpm)
  • API double suction
  • Double suction, general service
  • Vertical turbine, mixed-flow and propeller, single and multistage diffuser type


What You Will Learn:  

  • Better understanding across all types of rotodynamic pumps on how to approximate the efficiency of a pump based on flow, different features (i.e. super smooth pump finish/water passes more swiftly), speed, pressure and other parameters. 
  • Gain knowledge of standardized industry terms to interface with other engineers on pump efficiency. 


Applicable Markets:  Most markets where centrifugal pumps are used. 

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ISBN: 978-1-935762-44-7
Pages: 22
Approval Date: 2015
Table of Contents: View in PDF format
Also Available in Hardcopy: View now

Content: Pump types and factors that influence efficiency such as surface roughness, internal pump clearances and different types of pumpage, (graphs portray the relationship of pump efficiency versus different parameters), special impeller designs, such as those intended to increase suction specific speed or provide a specific curve shape can reduce the attainable efficiency, thrust balance devices as well as an example on how to attain efficiency of a solids handling submersible sewage pump.

Hot Link to TOC: http://www.pumps.org/estore/stdi/20.3b.pdf 

Who Should Buy This Standard:  For pump specifiers who must estimate pump performance, this standard serves assessment guide for pump efficiency.  Pump end users and engineering consulting firms can use the standard as a guide to determine how efficiency was predicted for pumps.

Important Notice: 

This standard is available for immediate download in secure PDF format. Standards in this format are a single-user license and are encrypted for security purposes. Each standard is authorized to a single login and password on a single desktop or laptop computer. The end-user license prohibits installation of these files on a network server or their shared use in an network environment.  These files may be transferred from an old computer to a new computer by following the instructions provided upon purchase or available online at estore.pumps.org/about.aspx.

To view HI Standards in this format requires the download of the free Adobe® Reader®. Authorization requires download of an Adobe-approved plug-in from FileOpen Systems, Inc. and Internet access to complete the authorization process. Security permissions of these files allow printing and the addition of comments. Once authorized these files may be accessed with or without connection to the Internet.


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