Hydraulic Institute Engineering Data Book __top__

Tables provide weight-to-volume ratios relative to water for hundreds of liquids.

Piping systems rely heavily on bends, tees, and valves, all of which restrict flow. The Data Book details: Resistance Coefficients (

Detailed information on the physical properties of various liquids, including viscosity measurements and vapor pressures for hundreds of compounds.

Published by the — North America’s largest association of pump manufacturers and fluid handling experts — this Data Book is the technical backbone of the industry. First conceived to standardize a chaotic field, it has evolved into a 400+ page compendium of: hydraulic institute engineering data book

When a pump designed for water (specific gravity 1.0, viscosity 1.0 cSt) is used to pump oil (viscosity > 50 cSt), internal hydraulic friction increases. This results in:

How fluid thickness changes with temperature, impacting friction.

However, as the engineering field has become more digital, the Hydraulic Institute recognized the need to evolve. The static data and manual calculations of the print edition, while reliable, could not easily be updated, limiting its utility in a fast-paced industry. Tables provide weight-to-volume ratios relative to water for

The Hydraulic Institute, established in 1917, is the largest association of pump manufacturers in North America. The Engineering Data Book evolved from the need to standardize the diverse methods of pump rating and selection used by different manufacturers. Before the widespread adoption of standardized testing, "marketing" hydraulic curves often differed wildly from actual performance.

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Water is the standard against which most pumps are rated. The book provides exhaustive tables for the physical properties of water across a wide temperature range. Published by the — North America’s largest association

Your specific or application (e.g., water treatment, chemical processing, HVAC)

While the second edition of the Engineering Data Book was published in 1990 and is currently out of print, its knowledge base has been meticulously preserved and digitized. The Hydraulic Institute (HI), a non-profit dedicated to the global pump industry for over a century, has evolved this content into a comprehensive, modern digital platform: the and the enhanced HI Data Tool . Both are available for free to professionals and academics , ensuring that this critical engineering knowledge remains accessible.

While the Standards define the rules of the game, the Data Book provides the playbook.

What specific are you currently trying to pump?