Through a knowledge of the COS and consulting with the
power utility and relevant pump curves, the designer can gen-
erally and quickly determine the approximate horsepower re-
quirements, bowl and motor diameter range, approximate riser
pipe size and type, available well clearance, and the operating
voltage and phase required for the project. A submersible
pump and motor each have unique construction features
needed for the higher speed and deeper well service, as illus-
trated in a cutaway drawing (Figure 2).
Once knowledge of the intended capacity and head are esti-
mated, the designer should determine the estimated horse-
power that will be required to enable estimating the needed
WATER WORKS
from page 31
Figure 1. Typical submersible deep-well pump installation.
Not to Scale
waterwelljournal.com
32 January 2017 WWJ