Tormac Horizontal Multistage Centrifugal Pump two or more impellers are mounted on the same shaft of the pump. An impeller and a ring section casing make up each stage. Replaceable wear rings are included with dynamically balanced impellers to maintain optimal clearance for greater efficiency. By placing the stages next to one another in pairs or groups, the axial thrust balance can be improved. To endure the greatest amount of radial thrust, each pump casing has a bush bearing supporting the pump shaft. Hydraulic balancing is provided by the bearing design, which eliminates axial thrust.