Page 144 - Know and Understand Centrifugal Pumps
P. 144
The System Curve
arrangement. Any three pumps, by the system design, indicate that
you’ll be operating two pumps on one side of the system and one pump
on the other side. The third pump will not be able to open the check
valve with two pumps keeping it closed. So in practice, you can operate
any one pump, or any two pumps (with the aforementioned hints from
the parallel operation section), or four pumps, but not three pumps.
The curve, shown in Figure 8-3 1, is indicative of this operation.
