Grundfos NBG/NBGE SuperVortex Impeller

Grundfos range of booster pumps are centrifugal type hence use the same working principle. Booster pumps boost water pressure and, in many cases, improves the flow rate. They rely upon one or more impellers to draw the pumped fluid into the intake of the pump, and to boost its pressure as the fluid passes through the impeller and the volute or diffuser casing. Some are single-stage, meaning that they have a single impeller. These are generally used in applications where the amount of additional pressure (head) that is required is not significant. There are also multi-stage configurations involving more than one impeller, which are used to deliver higher heads such as would be required to move water up to substantially higher elevations or through much longer pipelines.