KSB Megaflow
29
16. Operational Problems, Probable Causes and Solutions
Operational Problems
Probable Causes and Solutions
Insufficient Flow
Drive Overload
1, 2, 3, 4, 5, 6, 8, 9, 10, 11
12, 13, 14, 15, 28
Pump final pressure excessively high
15
Bearings Overheating
22, 23, 25, 26, 31, 34
Pump leakage
16
Excessive leakage at the shaft sealing
17, 18, 22, 23
Irregular pump operation, presents noise
3, 6, 11, 15, 21, 22, 23, 25, 30, 31, 32
Excessive heating of the pump casing
3, 6, 21, 32
Table 13
1- The pump is treading with an excessively high pressure on.
- Adjust the pump to the operational point.
2- Total height of installation (counter pressure), higher than the pump nominal height
- install an impeller with bigger diameter.
- increase the rotation (if turbine or combustion engine).
3- Pump and or suction piping are not totally full of liquid to be pumped or sealed.
- fill up the pump and the suction piping with the liquid to be pumped and / or seal both.
4- Suction piping and / or impeller are obstructed.
- remove the obstructions from the piping and / or impeller.
5- Air pocket formation in the piping.
- Change the piping layout.
- if necessary install venting valve.
6- Available NPSH too low (installation with negative suction).
- check and if necessary correct the level of pumped liquid.
- install the pump in a level lower than the suction reservoir.
- open completely the register of suction piping.
- change the suction piping in order to decrease load loss, if any excessive loss.
8- Air inlet in the sealing chamber.
- clear the channel that supplies liquid for lubrication/ sealing of the sealing chamber.
- maintenance of the gasket or mechanical seal.
9- Incorrect rotation direction.
- reverse one of the phases of the motor cable.
10- Low rotation.
- increase rotation.
11- Wear of the pump intern parts.
-
change the wasted parts.
12- Installation total height (counter-pressure), inferior to the specified in the order.
-
adjust the pump to the operation point.
-
in case the overloads continues, low the impeller.
Summary of Contents for MEGAFLOW 100-250
Page 33: ...KSB Megaflow 33 17 3 Execution with K Impeller AK Bearing Bracket Figure 26 ...
Page 34: ...KSB Megaflow 34 17 4 Execution with O Impeller AK Bearing Bracket Figure 27 ...
Page 36: ...KSB Megaflow 36 17 6 Execution with Impeller K O Bearing Bracket P65 160 Figure 27 ...
Page 38: ...KSB Megaflow 38 17 8 Execution with Impeller K and Bearing Bracket P80 200S Figure 28 ...
Page 40: ...KSB Megaflow 40 17 10 Execution with Impeller E Bearing Bracket AK Figure 29 ...
Page 42: ...KSB Megaflow 42 17 12 Execution with Impeller E and Bearing Bracket P65 160X Figure 30 ...
