Table of Contents
Advertisement
Available languages
Available languages
A B C D E F G H Possible cause
✘ ✘
-
-
-
-
-
- Speed is too high.
✘
-
-
-
-
-
-
- Tie bolts/sealing element defective
✘
-
-
-
-
-
-
- Worn shaft seal
✘
✘
-
-
-
-
-
- Score marks or roughness on shaft
✘
-
-
-
-
-
-
- Dismantle to find out.
✘
-
-
-
-
-
-
- Vibrations during pump operation
✘
✘ ✘
-
-
-
-
- Pump is warped or sympathetic
✘
-
-
-
-
-
-
- Increased axial thrust
✘
-
-
-
-
-
-
- Insufficient or excessive quantity of
✘ ✘
-
-
-
-
-
- Motor is running on two phases only.
✘
-
-
-
-
-
-
- Rotor out of balance
✘
-
-
-
-
-
-
- Defective bearing(s)
✘
✘ ✘ Flow rate is too low.
-
-
-
-
-
✘
-
-
-
-
-
-
- Incorrect inflow of circulation liquid.
✘ ✘
-
-
-
-
-
- Transport lock has not been removed
Pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
5)
48 of 58
8 Trouble-shooting
protecting sleeve / shaft sleeve
vibrations in the piping.
6)
lubricant or unsuitable lubricant.
from the shaft groove.
Normblock
Remedy
5)
6)
Reduce speed.
Fit new sealing element between volute
casing and casing cover.
Re-tighten the bolts.
Fit new shaft seal.
Check flushing liquid/barrier fluid.
Replace shaft protecting sleeve / shaft sleeve.
Fit new shaft seal.
Correct.
Fit new shaft seal, if required.
Correct suction conditions.
Re-align the pump set.
Re-balance the impeller.
Increase pressure at the pump suction nozzle.
Check the piping connections and secure
fixing of pump; if required, reduce distances
between the pipe clamps.
Fix the pipelines using anti-vibration material.
Clean balancing holes in the impeller.
Replace the casing wear rings.
Top up, reduce or change lubricant.
Replace the defective fuse.
Check the electric cable connections.
Clean the impeller.
Re-balance the impeller.
Replace.
Increase the minimum flow rate.
Increase the free cross-section.
Remove transport lock from the shaft groove.
Advertisement
Chapters
Table of Contents
