Does the application have a high static pressure or head?

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Does the application have a high static pressure or head?

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Applications in which a minimum pressure must be maintained may not be suitable candidates for a VFD. For example, if high pressure is required even at low flow, it may not be possible to significantly reduce pump speed. When speed and flow reduce, so does pressure. For this application, other energy-saving strategies such as parallel pumps may offer more energy savings. Check the pressure limitations in your system. More information on VFD pumping applications is in Variable Speed Pumping – A Guide to Successful Applications, available from the U.S. Department of Energy’s Industrial Technology Program.

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