Fisher Pumps designed pumps to operate without mechanical bearings or bearings submersed in the fluid. While being successful in pumping highly abrasive and viscous fluids in the oil fields, we started experimenting with different impeller curves. From extensive testing, we developed three impeller designs:
The mud style for high percentage solids in fluids with high viscosity.
The irrigation style for efficient pumping capacities per Horse Power for up to 50 feet of TDH.
The manure style for pumping fluids with straw and high percentage solids that will not plug while pumping.