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Exceeding expectations for over 29 years. |
   
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In This Issue
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As Seen in Pumps & Systems Magazine January 2012 Issue This article is the second part of the series that outlines how digital pump curves are created, as well as some of the accuracy issues that may arise from the methods of curve digitization. This article fits in nicely with the 4,000 year pump history coverage in this month's issue. Be sure to check it out. Read the Full article on page 54 of the January 2012 Issue OR read it online here. |
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Pump Webinar - 2 Hours, Learn From Your Desk
First spring course begins in February with a Piping System Fundamentals in Houston, Texas, February 28 & 29, and the course is filling up fast! Make sure to reserve a seat today.
Piping System Fundamentals » Course Details
Centrifugal Pump Webinar scheduled for February 2nd, 2012 » Register Now » Full Course Outline
Learn from the comfort of your own computer, and apply your new knowledge back on your job immediately!
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Watch the PIPE-FLO Quick Start Video today, then take the Quiz and Earn 1 Professional Development Hour free.
Paul Wilson Congratulations to all of you! Nice Job! |
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Q: What is NPSH for a tank open to atmosphere? What would cause a negative pressure (vacuum) at the pump suction?
A: NPSH, or Net Positive Suction Head, is the amount of fluid energy at the pump suction in reference to absolute zero energy. In relation to centrifugal pumps, Net Positive Suction Head required (NPSHr) is the amount of fluid energy at the pump suction at which the pressure at the eye of the impeller drops below the vapor pressure of the liquid and vapor bubbles begin to form. Pump manufacturers test their pumps to determine the NPSHr over the range of operating flow rates for the pump.
The amount of fluid energy the piping system provides to the pump suction is called the Net Positive Suction Head available (NPSHa). NPSHa is a function of the following characteristics of the piping system on the suction side of the pump:» Read the Full Answer Here
Have a general piping system question? Send your questions to ask@eng-software.com.
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 Earlier this month, ESI attended the AHR Expo in Chicago, IL. Thanks to all who participated in the New Technology Presentation during the show! Especially the lively Q&A period. This February, ESI will be providing a custom onsite training courses in Georgia for the Crane Company. Due to a severe winter storm in Western Washington January 18-20th, ESI was temporarily shut-down and without power. ESI would like to apologize to anyone who may have been affected by the inconvenience. Thank you for being patient with us. All systems should be up and running and we believe to be completely caught up. Please contact us again if you believe we missed reconnecting with you due to the outage. |
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 In recognition of Engineered Software's upcoming 30th Anniversary, Ray Hardee takes a look back at how one our most popular products, PUMP-FLO was created. Part Two of PUMP-FLO's beginnings discusses what lengths Ray was willing to go to in order to convince the first few pump manufacturers the value of PUMP-FLO. Please feel free to contribute your comments on the subject. We read every email and comment so send us your thoughts and suggestions to blogger@eng-software.com. |
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