Self-Priming Vortex Pump series 25ZB Electric Self-Priming peripheral Pump STRUCTUREAL CHARACTERISTICS 1. Cast iron Pump body, with UNI ... due to the impeller blocking. 3. Brass impeller, with radial peripheral blades, floating on the shaft 4. Stainless steel motor shaft ... and the automatic distribution of water from surge tanks. These pumps should be installed in a covered area, protected against the ...