High-efficiency enbloc centrifugal electric pumps, with one impeller, particularly fit for small and medium flowing irrigations and, in general, whenever high deliveries in relation to small/medium heads are required. Pump body and bracket of cast-iron; cast-iron impeller except for models SB 100 - 150/2 which are equipped with a brass alloy impeller; shaft of stainless steel; mechanical seal. Closed self-ventilated motor; IP 44 protection degree. Single-phase feeding: 220 V - 50 Hz, with a permanently connected condenser and, on demand, with a set-in thermal protection. Three-phase feeding: 220/380 V - 50 Hz; users are charged with its relevant protection. Max. service pressure: 6 bar; pumped liquid temperature up to 90 °C.