The main characteristic of the electric pumps with semi-axial impellers is to give high deliveries with low heads. The impellers and the diffusers are in grey cast iron, (on request, the impellers can be supplied in bronze), whereas the bearings are in ceramic/rubber lubricated by the water circulation. Check valve is incorporated in the delivery body with threaded outlet (on request , it can be supplied flanged). The coupling Pump-motor is according to NEMA regulations.