Causes and removal of operational faults
760.0002 GB - 150 500
BA-2011.11
Series AE1F, AE1L, AE.E, AE.N, AE.H, AE.V, AED1E,
AED2N ID, ZD construction types
51
No
.
Operational disturbances Causes and removal
a b c d e f g h i k
1
High adhesion between rotor and stator in new condition after
long period of downtime Use tool to manually turn pump.
2
Reference arrow on pump to check direction of rotation; reverse
polarity of motor if necessary.
3
Check suction line and shaft seal for leaks.
4
Check suction head; enlarge cross-section of suction line if
necessary. Install larger filter. Open suction valve completely.
5
Check viscosity of pumped liquid.
6
Check speed of rotation. Check speed and power consumption
of drive motor. Check voltage and frequency.
7
Avoid air inclusions in pumped liquid.
8
Check delivery head. Fully open gate valve in pressure line,
remove blockage in the pressure line.
9
Pump is running partially or completely dry. Make sure enough
pumped liquid is present on the suction side.
10
Increase speed with low-viscous liquids and large suction
volume.
11
Reduce speed with viscous liquids - danger of cavitation.
12
Check longitudinal tolerance of joint pins, joint bush may be
improperly installed.
13
Check for foreign objects in the pump, disassemble pump,
remove foreign objects, replace any defective parts.
14
Stator and rotor are worn. Disassemble pump, replace defective
parts
15
Joint parts (f, g) and/or drive shaft or shaft sleeve (b, c) are worn.
Disassemble pump, replace defective parts
16
Suction line partially or completely blocked.
17
Check temperature of pumped liquid. Stator expansion too large;
stator stuck on rotor; stator may be burned or swollen.
18
Gland packing: Replace unusable rings (b, c, k), loosen stuffing
box gland (a, h), tighten stuffing box gland (b, c, k).
19
Proportion of solids and/or grain size too large. Reduce speed.
Install screen in front of pump with permissible mesh size.
20
Solids settle and harden when pump stops. Immediately flush
pump; disassemble and clean if necessary.
21
Liquid solidifies when temperature drops below certain limit: Heat
pump.
22
Precisely align coupling or belt pulley.
Tab. 14 Troubleshooting disturbances
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