Dear, I have a confusion related to the attached image which represents the curve performance of centrifugal pumps. My point is, why is the consumed power, on the same pump curve, is increased as the flow increases?!!! since the logic for me is the opposite at which the consumed power should increase as the pressure drop increases ! From another perspective, I know that the consumed current is always in a proportional relationship with the torque/ load, so how its come when the pump has less load\pressure-drop and thus higher flow rate to consume more current by its driving motor? <The attache drawing was taken from: http://blog.craneengineering.net/how-to-read-a-centrifugal-pump-curve Regards.