Centrifugal pump having a unitary one-piece diffusion casing and a unitary one piece turbine impeller unit

A centrifugal pump for pumping fluid comprising,

• a one-piece, elongated diffusion chamber casing and a unitary peller unit mounted for rotation within the casing, the combination forming a unitary pump having an inlet end and an outlet end, the casing having exterior and interior sidewalls,
• the diffusion casing having at least one pumping chamber therein, the pumping chamber having a plurality of inwardly extending fluid directing vanes, the vanes being so configured to direct the pumped fluid within the chamber upwardly towards the outlet end of the pump, the pumping chamber being in fluid communication with the inlet end and the outlet end of the pump,
• unitary inwardly facing bearing means integral with the interior sidewalls of the diffusion casing,
• an impeller to effect movement of fluid through the pumping chamber and being located in the pumping chamber, the impeller comprising an upper end and a lower end and having fluid directing vanes therebetween,
• unitary outwardly facing bearing means integral with the impeller and positioned to be placed adjacent the bearing means of the diffusion casing to form a dynamic bearing surface between the impeller and the diffusion casing.