Improper startup can result in excessive temperature and radial loading, both of which can lead to lower pump reliability from problems such as seal and bearing failure. Consultant Ross Mackay describes the three steps that should be followed during pump startup.
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That rumbling/rattling noise you hear from your pump is the symptom for any number of potential problems. The first step is identifying the problem. This article will help you determine what exactly is wrong with your pump.
The Hydraulic Institute has launched a new National Pump Systems Educational Initiative called "Pump Systems Matter." Its primary focus is on pump systems education and outreach as well as energy savings.