ANSI/HI Pump Standards are available in both hardcopy and secure PDF formats. Secure PDFs are immediately downloadable and incur no shipping or handling charges. Standards in this format are a single user license and require a one-time authorization using an Adobe-approved plug-in from FileOpen Systems.
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Hydraulic Institute Program Guideline for Circulator Pump Energy Rating Program (HI 41.5-2018)

The purpose of the Hydraulic Institute Circulator Pump Energy Rating Program Guideline is to define the requirements to participate in and list circulator pumps in the Hydraulic Institute Energy Rating Program. 

Hydraulic Institute Standard for Methods for Rotodynamic Pump Efficiency Testing (HI 40.6-2021 - Secure PDF)
This standard establishes minimum testing protocols for testing of rotodynamic pumps for determination of pump efficiency in a uniform manner.
Rotodynamic Pump Efficiency Prediction (HI 20.3-2020 - secure PDF)
Scope: 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.
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