The Jordan, Knauff & Company (JKC) Valve Stock Index was down 12.5 percent for 2011, well below the broader S&P 500 Index, down only 1.1 percent.
Featured Articles
The DEF Market
The diesel exhaust fluid market creates opportunities for pump manufacturers.
Dry Gas Seal Requirements
Find a reliable dry gas seal system for any application.
Pump Replacement Part Availability
Address this problem to avoid the possibility of future crises.
State of the Industry 2012
Submersible pump industry survey provides a unique forecast.
Latest Articles
Editors Note: In the January 2012 issue of Pumps & Systems, we were proud to bring you an in-depth look at some of the highlights of ground-breaking achievements in pump technology through the years. We suspected that our readers would come through with some information that we did not have.
The diesel exhaust fluid market creates opportunities for pump manufacturers.
Many options are available when pump repair is required.
When stator wear was an issue, a custom-made replacement part was the solution.
Address this problem to avoid the possibility of future crises.
Why don’t my PTFE gaskets seal FRP, plastic and other light load flanges?
Columns and Blogs
Tackling 4,000 years of pump technology and evolution in only eight pages of magazine space has been like trying to summarize War and Peace in one sentence.
In this multi-part series, we will investigate several aspects of centrifugal pump efficiency.
First of Five Parts
Since the original publication of this draft standard in the January 2008 issue of Pumps & Systems, I have received feedback, encouragement, numerous questions and criticism. The draft listed three basic levels of repair.
The McGraw-Hill scientific dictionary [5] states that a volute is "a spiral casing for a centrifugal pump... designed so that speed will be converted to pressure."
More Articles
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Monitoring motor-pump combinations for signs of impending problems provides useful information to prevent pump failure and minimize costly downtime. Since rotating machines exhibit recognizable failure modes that are revealed by their vibrations, analysis of vibration data can identify changing conditions and diagnose an evolving problem. This can be the difference between a plant or mill continuing to operate or having to shut down for unscheduled repairs.
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Economic pressures to minimize production downtime and improve operating efficiency are increasing the emphasis to accomplish on-site problem detection, analysis, and resolution as fast as possible. These requirements place a great deal of pressure on maintenance personnel to have all the right tools readily available in one place.
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Q. How carefully must pump impellers be balanced to avoid unacceptable vibration levels when the pump is running?
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Given time, every component of the rotating machinery will eventually fail, even when operating in a perfect environment. For instance, rotation of the shaft subjects it to alternating load, changing from tension to compression with each shaft revolution.
