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PVML USER INSTRUCTIONS ENGLISH 00079591 – 01/05
®
FAULT SYMPTOM
Pump overheats and seizes
⇓
⇓
Bearings have short life
⇓
⇓
Pump vibrates or is noisy
⇓
⇓
Mechanical seal has short life
⇓
⇓
Mechanical seal leaks excessively
⇓
⇓
Pump requires excessive power
⇓
⇓
Pump loses prime after starting
⇓
⇓
Insufficient pressure developed
⇓
⇓
Insufficient capacity delivered
⇓
⇓
Pump does not deliver liquid
⇓
⇓
PROBABLE CAUSES POSSIBLE REMEDIES
Wearing ring surfaces worn. Replace worn wear ring/surfaces.
Impeller damaged or eroded. Replace or CONSULT FLOWSERVE for improved
material selection.
Leakage under sleeve due to joint failure. Replace joint and check for damage.
Shaft sleeve worn or scored or running off centre. Check and renew defective parts.
Mechanical seal improperly installed. Check alignment of faces or damaged parts and
assembly method used.
Incorrect type of mechanical seal for operating
conditions.
CONSULT FLOWSERVE.
Shaft running off centre because of worn bearings. Check misalignment and correct if necessary. If
alignment satisfactory check bearings for excessive
wear.
Impeller out of balance resulting in vibration.
Abrasive solids in liquid pumped.
Internal misalignment of parts preventing seal ring
and seat from mating properly.
Check and CONSULT FLOWSERVE.
Mechanical seal was run dry. Check mechanical seal condition and source of dry
running and repair.
Internal misalignment due to improper repairs
causing impeller to rub.
Check method of assembly, possible damage or
state of cleanliness during assembly.
Remedy or CONSULT FLOWSERVE, if necessary.
Excessive thrust caused by a mechanical failure
inside the pump.
Check wear condition of impeller, its clearances and
liquid passages.
Excessive grease in ball bearings. Check method of regreasing.
Lack of lubrication for bearings. Check hours run since last change of lubricant, the
schedule and its basis.
Improper installation of bearings (damage during
assembly, incorrect assembly, wrong type of
bearing etc).
Check method of assembly, possible damage or
state of cleanliness during assembly and type of
bearing used. Remedy or CONSULT
FLOWSERVE, if necessary.
Damaged bearings due to contamination. Check contamination source and replace damaged
bearings.
C. MOTOR ELECTRICAL PROBLEMS
Wrong direction of rotation. Reverse 2 phases at motor terminal box.
Motor running on 2 phases only. Check supply and fuses.
Motor running too slow. Check motor terminal box connections and voltage.
Page 26 of 29
- USER INSTRUCTIONS: 1
- CONTENTS 2
- ALPHABETICAL INDEX 2
- 1.6 Safety 4
- 1.9 Noise level 8
- 4.4 Grouting 11
- 4.5 Initial alignment 13
- 4.6 Piping 13
- 4.7 Electrical connections 14
- 5.7 Starting the pump 16
- 5.8 Running the pump 16
- 5.9 Stopping and shutdown 17
- 6.0 General 18
- 6.1 Maintenance schedule 18
- 6 MAINTENANCE 18
- 6.2 Spare parts 19
- 6.3 Recommended spares and 19
- 6.4 Tools required 19
- 6.5 Fastener torques 20
- 6.7 Disassembly 20
- 6.8 Examination of parts 21
- 6.9 Assembly 22
- FLOWSERVE 29
- REGIONAL SALES OFFICES: 29
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