VM 760.0002 GB / 02.04 – Ident-Nr. 150 500
Series AE1L, AE.E, AE.N, AE.H, AE.V, AED1E, AED2N
Design ID, ZD
8.
Operating faults, causes and remedial action
No.
Interruptions of service
Cause and remedial action
Pump
does
not
start
Pump
does not
draw
Discharge
not
achieved
Pressure
height not
achieved
Pump
discharges
unevenly
Pump
emits
noises
Pump
is
stuck or no
longer
discharges
Motor
gets too
warm
Stator
wears down
prematurely
Leaking
shaft sea
ringl
a b c d e f g h i k
ALLWEILER eccentric screw pumps work disrup-
tion-free at all times when they are deployed in
accordance with the operating conditions stated in
our order confirmation and when the operating
instructions are observed.
1
•
•
High adhesion between the rotor and stator in a
new state after longer periods of standstill. Turn
pump by hand with auxiliary tools.
2
•
Check the rotation direction with the arrow on the
pump. In case of wrong direction, reverse the
polarity on the motor.
3
•
•
•
•
•
Check suction pipe and shaft seal for tightness.
4 • • • •
Check suction height – poss. increase suction pipe
diameter – install larger filters – open suction valve
all the way.
5
•
•
•
Check viscosity of the conveyor media.
6
•
• •
Check the rotation speed of the pump – check
rotation speed and power consumption of the drive
motor – check voltage and frequency.
7
•
•
Avoid air bubbles in the conveyor medium.
8
•
• •
• •
Check pressure height – open slider in the pres-
sure pipe all the way, remove congestion in the
pressure pipe.
9
•
• • • •
Pump runs partially or completely dry.
Check whether there is sufficient conveyor media
on the suction side.
10
•
•
Increase the rotation speed with thin media and
large suction volume
11
•
•
•
Reduce rotation speed with viscous media –
danger of cavitation.
12
•
Check longitudinal clearance of the joint bolts,
poss. joint bush wrongly mounted.
13
•
•
• • •
Check for foreign objects in the pump, dismount
pump, remove foreign objects, replace defect
parts.
14
• •
•
•
Stator and rotor worn out. Dismantle pump, re-
place defect parts.
15
• •
•
•
Joint parts (f, g) and/or drive shaft resp. shaft
protector sleeve (b, c) worn out: dismount pump,
replace defect parts.
16
•
•
•
•
Suction pipe partially or completely obstructed.
17
•
•
•
• •
Check the temperature of the conveyor media –
stator expansion too large – stator stuck on the
rotor – stator poss. burnt or swollen.
18
•
•
• • •
Stuffing box: exchange obsolete rings (b,c,k),
loosen gland (a,h), tighten gland (b,c,k)
19
•
•
• •
Solid substance content and/or graining too large
– reduce rotation speed: install a sieve with admis-
sible mesh width in front of the pump.
20
•
•
• •
Solid substances sediment when the pump stands
still and harden. Rinse pump immediately, if nec-
essary dismount and clean.
21
•
•
• • •
Medium hardens when undercutting a certain
temperature limit – heat pump.
22
•
•
Aligns clutch or pulleys exactly.
Technical alterations reserved.
ALLWEILER AG
Business Unit Eccentric Screw Pumps
Postfach 200123
46223 Bottrop
Kirchhellener Ring 77-79
46244 Bottrop
Germany
Tel. +49 (0)2045 966-60
Fax. + 49 (0)2045 966-679
E-Mail: [email protected]
Internet: http://www.allweiler.com