The Tesimag medium-pressure pumps are centrifugal pumps with horizontal axis consisting essentially by a cast iron impeller, a cast iron pump body and a motor group specifically designed. The closed type impeller is dynamically balanced and it has holes for balancing the axial thrust. The stainless steel shaft is driven by ball bearings lubricated with grease. Tesimag medium pressure pumps are used as booster pumps, in recirculation systems, heating, cooling, heat recovery, water supply plants, booster groups and fire fighting units. These pumps are suitable for use with clear and clarified water but also with aggressive water because these pumps can be made with different materials such as marine bronze and stainless steel.