The APB series are with two back to back impellers (with axial thrust balancing). It use is ideal for high head values where single impeller types are hard to reach. Suitable for civil and industrial boosting, fire fighting plants, flood irrigations, etc. It uses to pump clean water and chemically non-aggresive liquid. Particularly be used for increasing the supply pressure, feeding boilers and loading extremely. These pumps should be installed in a covered area, protected against the weather.