642 



HYDEAULICS AND ITS APPLICATIONS 



FIG. 313. Mather-Keynolds High-Lift Pump with Double Inlet. 



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FIG. 314. Mather-Keynolds Quadruple Turbine Pump. 



inlet, end thrust becomes serious and special devices must be adopted to 



overcome this difficulty. These will be considered in detail in Art. 183. 



With any of these types of pump, efficiencies of between 72 and 80 per 



