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I N S T A L L A T I O N , O P E R A T I O N A N D M A I N T E N A N C E M A N U A L
Faults due to a wrong pump selections
A number of the most frequently occurring failures as well as their possible causes are
set forth in the below table.
Most frequently occurring failures
Pump doesn't deliver any liquid
Volume flow of the pump is insufficient
The discharge head of the pump is
insufficient
Pump stalls after it has been put into
operation
The power consumption of the pump is
higher than normal
The power consumption of the pump is
lower than normal
The stuffing box is leaking excessively
Shaft packing or mechanical seal have to
be replaced to often
Pump vibrates or makes noise
Bearings wear too soon or gets hot
Pump runs with difficulty, gets hot or stuck
11.1. POSSIBLE CAUSES
1. Pump or suction pipe not sufficiently filled or de-aerated.
2. Gas or air coming from the liquid.
3. Air lock in the suction pipe.
4. Suction pipe leaks air.
5. The pump sucks in air through the stuffing box.
6. The sealing or flush water pipe to the stuffing box is not connected or blocked.
7. The lantern ring in the stuffing box has been mounted wrongly.
28 |
P a g e
1 2 3 4 5 6 7 8 9 10 11 13 14 17 19 20 21 29
1 2 3 4 5 6 7 8 9 10 11 13 14 17 19 20 21 28
29
2 4 5 13 14 17 19 28 29
1 2 3 4 5 6 7 8 9 10 11
12 15 16 17 18 22 23 24 25 26 27 32 34 38
39
13 14 15 16 17 18 20 21 28 29
6 7 23 25 26 30 31 32 33 43
6 7 23 25 26 30 31 32 33 34 35 36 41
1 9 10 11 15 18 19 20 22 23 24 25 26 27 29
37 38 39 40
23 24 25 26 27 37 38 39 40 42
23 24 25 26 27 34 37 38 39 40 42
:
Possible causes
D E C C A N I N D U S T R I E S
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