... water-power design, reasonable structure and highly corrosion-resistant materials, ZJ slurry pumps have high-efficiency, good-cavitation-capability, long-lifespan ... -drivenMeaning of Serial No.For example: 200 ZJ I A 60 200: outlet diameter (mm)ZJ: slurry pumpI: single stage pumpA: No. of ... impeller's vanes (A for 5pcs,B for 4pcs,C ...