Hydraulic Institute publishes landmark viscosity correction standard


Parsippany, NJ —The Hydraulic Institute (HI) has published its new “American National Standard for Effects of Liquid Viscosity on Rotodynamic (centrifugal and vertical) Pump Performance (ANSI/HI 9.6.7).” Replacing HI’s over-40-year-old viscosity-correction nomographs, the standard is designed to predict the performance change of rotodynamic pumps operated on viscous liquids exhibiting Newtonian behavior relative to their performance on water, which is the basis for most published curves.

“By eliminating the need for interpolating graphic solutions, this standard has major technical significance and practical application,” explained Gregg Romanyshyn, technical director for HI. “This landmark will provide valuable guidance to pump manufacturers, users, and others who have an interest in the performance of rotodynamic pumps.” HI members—comprising an array of prominent industry experts—developed the new standard collaborating with representatives from France, Germany, Italy, Japan, and Switzerland.

A variety of conventionally designed rotodynamic pumps are covered, such as open- or closed-impellers and single- or double-suction pumps. Additionally, included are information on methodology, definitions of symbols and terms, flowcharts which outline the procedure, theoretical explanations behind the methodology, and a method for estimating net positive-suction head required (NPSHR).

Designated by HI product code A131, it is available in hard copy or secure-PDF format from HI for $195.00. ANSI/HI Pump Standards, on CD-ROM Version 2.0, is a newly released product that includes the full text of all ANSI/HI Standards and is available for $750.00.

The 89-year old Hydraulic Institute is North America’s largest pump-producer association, serving member companies and pump users worldwide.

For more information visit:

Richard Phelps , senior editor, Control Engineering

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Learn how to create value with re-use; gain productivity with lean automation and connectivity, and optimize panel design and construction.
Machine design tips: Pneumatic or electric; Software upgrades; Ethernet advantages; Additive manufacturing; Engineering Leaders; Product exclusives: PLC, HMI, IO
Industrial wireless cyber security: More complex than black and white; IIoT at the I/O level; Process modeling; Cyber security research
Robotic advances: Software, form factors; System-based ROI; Embedded control; MES and information integration; SCADA and cyber security; Position sensor; Controller, I/O module
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again
Pipeline vulnerabilities? Securing hydrocarbon transit; Predictive analytics hit the mainstream; Dirty pipelines decrease flow, production—pig your line; Ensuring pipeline physical and cyber security
Cyber security attack: The threat is real; Hacking O&G control systems: Understanding the cyber risk; The active cyber defense cycle