Conclusion
Application of variable speed to centrifugal pumping

We have just outlined a simple method for quickly estimating the electrical energy savings provided by the use of variable speed in the case of variable flow centrifugal pumps.

In this respect, it should be remembered that variable speed not only saves energy, but also reduces equipment running costs by extending its service life, since mechanical stresses, vibrations and pump starting conditions are improved (for further information on this subject, see the bibliographical references and