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No Discharge
1,2,3,4,5,7,8,9,10,17,18,19,20,
37,49
Reduced Capacity
2,3,4,5,7,8,9,10,11,17,19,20,21,383
9,40,47,49
Reduced Pressure
5,7,8,11,13,18,19,38,39,40,47,49
Loss of Prime
2,3,4,7,10,11,20,21,22,23,49
Power consumption
6,12,13,17,18,19,24,33,34,35,3637,
excessive, driver runs
38,41,42,43,44
hot
Pump Fails Prime
1,4,5,10,20,21,49,50,51
Pump not primed
1.
Suction line not filled
2.
Air pocket in suction line
3.
Suction inlet or foot valve obstructed,
4.
insufficiently submerged, or too small
System head higher than pump design head
5.
System head lower than pump design head
6.
Insufficient NPSH
7.
Parallel pump application is incorrect
8.
Suction pressure to vapor pressure below
9.
minimum
Suction lift too high
10.
Excess vapor in pumpage
11.
Specific gravity of pumpage different than
12.
design
Viscosity of pumpage different than design
13.
Operation at below rated capacity
14.
Cavitation
15.
Electrolysis
16.
Impeller obstructed
17.
Wrong rotation direction
18.
Low speed
19.
Air leak into suction line
20.
Air leak through mechanical seal
21.
Seal fluid contaminated, hot or insufficient
22.
Seal fluid system not vented
23.
High speed
24.
Mechanical seal insufficient
25.
Bearing housing excessively cooled
26.
Low oil pressure (oil lube bearings)
27.
Improper or poor lubrication
28.
Lubrication defective
29.
Dirt in lubricant/bearing housing
30.
Moisture in lubricant/bearing housing
31.
Lubricant excess
32.
Pipe strain
33.
Temperature growth
34.
Misalignment
35.
Coupling improperly installed
36.
Impeller installed backwards
37.
Wear rings worn
38.
Impeller damage
39.
Vibration and noise
Seal: excessive leakage,
short life, seal housing
overheating
Bearings: over heating,
short life, noise
Pump overheating, seizes
Corrosion, erosion,
pitting, oxidation or other
loss of material
Improper balance (after repair)
40.
Bent shaft
41.
Excessive thrust
42.
Rotational element dragging
43.
Worn or incorrectly installed bearings
44.
Mechanical seal not properly set, O-rings
45.
damaged of hardened
Shaft scored at seal
46.
Volute O-ring
47.
Foundation not rigid or settle
48.
Suction line collapsed
49.
Not enough liquid in casing
50.
Suction check valve contaminated or damaged
51.
2,4,9,10,14,15,17,26,27,28,29
30,31,32,33,34,35,36,39,40,
41,42,43,44,48,49
22,23,25,33,34,35,36,41,44,
45,46
26,27,28,29,30,31,32,33,34,
35,36,41,42,43,44
1,8,9,14,33,34,35,36,41,42,43,
44
7,8,11,14,15,16
21
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