320
Dixon Sanitary 2014
800.789.1718
Pump
BC-Series Sanitary Centrifugal Pump
A:
This section references the size of the pump, speed, frequency and the model number.
B:
y axis, shows head in feet
C:
x axis, shows flow in GPM
D:
These solid line curves are for specific impeller diameters.
E:
The dotted line curves are for motor horsepower requirements.
F:
Duty point, where the flow and head requirements intersect.
G:
NPSH required for the duty point.
Example:
72
GPM @ 40' Head of water
Find 72 GPM on the curve and then go upwards until you hit the line that is 40’ of head on the impeller trim curves. This
determines what impeller diameter is needed for your application. This is your duty point as labeled F. To determine the
horsepower required, from the duty point go towards the right to the closest dotted horsepower curve and that will be the size of
motor you will need.
To determine the NPSH required, from the duty point, draw a line straight downward and where that intersects is the NPSH
required in feet. That figure is on the y axis in feet.
In this example the pump you would select would be:
Model No. BC114, 3.5" impeller diameter, driven by a 1½ HP, 3500 RPM motor, NPSHr would be 8'.
How to Read a Curve
V