BA series pumps
1401 Troubleshooting tables
10.3
Problem Cause Possible solution
Pump stops
immediately after
starting
Vacuum pump does not draw a vacuum Inspect vacuum pump
Gas or air is released from the liquid Ensure that the liquid flows more slowly/
smoothly
Air pockets form in the suction line Eliminate air entrapment to the extent
possible
Inlet of the suction pipe is insufficiently
submerged
Submerge the suction line more deeply
The suction height is too great or there is
too little difference between the geometric
height and the vapour tension of the liquid
(NPSH too low)
Place pump at a lower height; Otherwise:
use a different type of pump
The suction pipe is clogged Clean
There is a leak in the suction pipe Eliminate leak
Problem Cause Possible solution
Pump is
demanding
abnormal amount
of power
Incorrect direction of rotation Reverse direction of rotation
Foreign object in the impeller Clean impeller
The shafts are not in alignment with one
another
Align unit
The shaft is bent Replace shaft
Rotating parts are rubbing against
stationary parts
Adjust everything and align if necessary
The wear plates/ring or impeller is/are worn Adjust or replace wear parts
The impeller is damaged Repair or replace
The seal is not installed properly Install properly; replace seal if necessary.
Inadequate lubrication or insufficient
lubricant in the bearing housing, possibly as
a result of a leak; can be identified by higher
than normal temperature
Follow good service plan
In this application the pump is not
functioning in the intended range
Make changes to the piping system, if
possible
Otherwise: use a different type of pump
The liquid has a higher s.g. or viscosity than
that for which the pump is intended
Change temperature of liquid, if possible.
Otherwise: use a different type of pump
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