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10 6.Operating problems 2021/11
6. Operating problems
The table given below provides solutions to problems that might arise during pump operation. With respect to the same, it is
assumed that the pump has been properly installed and has been correctly selected for the application in question.
Should there be a need for technical service please contact INOXPA.
Operating problems
Probable causes
Overloading of motor. 3.
Insufficient flow rate or pressure in pump. 1, 2, 3, 4, 9, 10.
Irregular discharge flow rate / pressure. 1, 3.
Noise and vibrations. 2, 3, 4, 7, 10.
The pump gets clogged.
3, 4, 7.
Overheating of the pump. 3, 4, 7.
Abnormal wear.
4, 7, 10, 11.
Leak in mechanical seal.
5, 6, 8.
Probable causes Solutions
1 Wrong rotation direction. Change the direction of the rotation.
2 Delivery pressure is too high. If necessary, decrease the load losses by increasing the diameter
of the piping, for example.
3 The viscosity of the liquid is too high. Decrease the viscosity by heating the liquid, for example.
4 The temperature of the liquid is too high. Decrease the temperature of the liquid by cooling it.
5 Mechanical seal either damaged or worn. Replace the seal.
6 Unsuitable stator or O-ring for the liquid in question. Fit more suitable O-ring by consulting the supplier with respect to
the same.
7 There are foreign bodies in the liquid. Place a filter at the suction piping.
8 The tension of the mechanical seal spring is too low. Adjust in accordance with the instructions given herein.
9 The pump speed is too low. Increase the speed.
10 The stator is worn out. Replace the stator.
11 Very abrasive liquid. Mount the more suitable material of stator (check with the
supplier).
If the problems persist stop using the pump immediately. Contact the pump manufacturer or his
representative.