KSB RPH - Page 61

A B C D E F G H Possible cause
Remedy
23)
✘ ✘ Speed is too high.
Reduce speed.
24)
✘ Defective gasket Fit new gasket between volute casing and
discharge cover.
✘ Worn shaft seal Fit new shaft seal.
Check flushing liquid/barrier fluid.
✘ Vibrations during pump operation Correct suction conditions.
Re-align the pump.
Re-balance the impeller.
Increase pressure at the pump suction nozzle.
✘ ✘ ✘ The pump set is misaligned. Re-align.
✘ ✘ ✘ Pump is warped or sympathetic
vibrations in the piping.
Check the piping connections and secure
fixing of pump; if required, reduce distances
between the pipe clamps.
Fix the pipelines using anti-vibration material.
✘ ✘ Insufficient or excessive quantity of
lubricant or unsuitable lubricant.
Top up, reduce or change lubricant.
✘ Non-compliance with specified
coupling distance
Correct distance according to general
arrangement drawing.
✘ ✘ Motor is running on two phases only. Replace the defective fuse.
Check the electric cable connections.
✘ Rotor out of balance Clean the impeller.
Re-balance the impeller.
✘ Defective bearing(s) Fit new bearing(s).
✘ ✘ Flow rate is too low. Increase the minimum flow rate.
✘ Incorrect inflow of circulation liquid. Increase the free cross-section.
23)
Pump pressure must be released before attempting to remedy faults on parts which are subjected to pressure.
8 Trouble-shooting
RPH
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