Terminology Of The vertical turbine pump
1. Grade -The elevation of the surface supporting the pump.
2. Static Water Level -The vertical distance betweengrade and the water level in the well when thepump is OFF.
3.Drawdown -The vertical distance the water islowered in the well during pumping.
4. Pumping Water Level - The vertical distancebetween grade and the water level in the well when the pump is ON.
5. Pump Setting -The vertical distance betweengrade and the top of the pump assembly.
6. Lift - The vertical distance from the pumpingwater level to the discharge level (this may behigher than grade).
7. Minimum Submergence - The lowest acceptablewater level in the well for pump operation.
8. Column Friction Loss - Losses incurred by the flowof water through the pump column assembly. SeeColumn Friction Loss Table for approximatevalues.
9. TDH (Total Dynamic Head) - The total of thefollowing: vertical elevation from the pumping water level to the discharge point plus all losses in the columnand discharge piping.
10. Lab Efficiency - Efficiency of the bowl assembly only. This value can be found on the pump performance curve.
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