... G(A) series Dredging Pumps G(A) series dredging pumps are international products with advanced technology. They are centrifugal pumps, structured with single-casing ... -abrasive, wide flow channel, easy erection and so on.These pumps are built of wet end, shaft seal, bearing assembly, base ... hardness above 58HRC.Defination of models; G(A) series Dredging Pumps