By Othman Soliman — Solids Control & Drilling-Waste specialist, 26+ yrs (GCC & MENA). Last reviewed .
STOP · Critical — stop and correctDecanting centrifuge →Cost of fault ≈ $40k+ / incident
Why it matters
High vibration on a bowl spinning at thousands of rpm escalates to bearing failure or bowl damage in minutes, not hours. Treat a genuine high-vibration trip as a STOP event until the cause is known.
Likely causes
Uneven cake / bowl imbalance — solids built up on one side throw the bowl out of balance.
Bearing wear or failure — mechanical, and the reason vibration is never ignored.
Product build-up from incomplete flushing left on the bowl interior.
Coupling / drive-belt wear or misalignment.
Loose mounting — degraded isolation mounts or slack hold-down bolts.
Feed surging — slugs of solids momentarily unbalancing the bowl.
How to diagnose it
Is it steady or pulsing with feed? Pulsing → cake/feed imbalance; constant → mechanical.
Carefully check bearing housings for heat or noise.
Inspect isolation mounts and re-check hold-down bolts.
Review flush history — an incomplete flush leaves an unbalanced bowl.
Check coupling and belt condition.
The fix — step by step
Stop feed and flush the bowl thoroughly to clear uneven cake; restart empty and watch the baseline.
If a clean, empty bowl still vibrates → it’s mechanical: lock out and inspect bearings/coupling.
Smooth the feed — fix surging at the feed pump/suction upstream.
Confirm it's fixed
✓ Verify: Empty-bowl vibration sits within the manufacturer’s baseline band and stays there when feed is reintroduced gradually. If it climbs only under feed, the problem is upstream balance — not the machine.
Field note. This is the one alarm you never “run through.” A centrifuge trying to shake itself off the skid will, given a few more minutes. Clean bowl first — most field vibration is cake — but a clean empty bowl that still shakes is a lockout.
The 10 Solids-Control Numbers Every Engineer Must Track — what to measure, the formula, the field target and the red flag. Grounded in API RP 13B-1, RP 13C, EPA 40 CFR 435 & OSPAR.