[18]
Operation within range of drooping head capacity curve
In the case of a pump which generates a drooping head capacity curve in a low-capacity range, do not operate
the pump in the section where the line droops to the left. (Refer to the standard performance curve to verify the
head capacity.) If the drooping section (left side) of the head capacity curve is part of the pump operation
specifications, design the piping with the following points in mind.
q
The discharge piping should have no water tank or air trap.
w
The discharge amount should be adjusted with the valve installed near the discharge port.
- 20 -
