Engineered to deliver lower operating costs than variable-speed pumps with standard induction motors, according to the manufacturer, the medium-range Design Envelop permanent magnet pumps are available with motors ranging from 15 to 50 hp. They operate at NEMA ultra-premium efficiency levels that exceed the efficiency targets of both the U.S. Department of Energy and the European Union. Better performance at higher speeds (rotations per minute) means that in some cases, a smaller pump can deliver the same flow and pressure as a larger model, says the company.

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