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The Grundfos CRNE vertical multistage centrifugal pumps offer integrated frequency converters. The CRNE series is part of the E-pump motor family, incorporating the Grundfos MGE motor which is designed to EN standards. The built-in frequency converter enables continuously variable control of the motor speed. This means that the pump can be set to operate at any duty point. The benefit of continuously variable speed control of the motor speed is to adjust the performance to a given requirement.