The process determines safety requirements
A centrifuge designed for one liquid is not automatically suitable for another. Density, temperature, solids content and chemical properties affect operating conditions. Changes require review with the manufacturer and technical owner before implementation.
Processing flammable, corrosive or potentially decomposing materials requires specific precautions. Assessment of Explosive atmospheres may be necessary; a closed casing alone does not demonstrate protection against fire or explosion in the process.
Imbalance and operating surveillance
Uneven deposits, wear or deterioration can disturb the balance of the assembly. Abnormal vibration must be investigated using the response specified for that model. Alarm thresholds must not be altered to keep production running without an authorised technical review.
Monitoring systems may measure speed, vibration and bearing temperature. Know which variables the installation actually measures, what each alarm initiates and who may authorise a restart. Sensors do not remove the need for inspection, and an alarm does not automatically establish the underlying cause.
Stopping, opening and maintenance
Silence or an indication that the motor is disconnected does not prove that the rotor has stopped. Access must remain protected while dangerous movement persists. The waiting period and verification method depend on the equipment; there is no universal interval suitable for every centrifuge.
Dismantling requires energy control under the Lockout/Tagout (LOTO) procedure, including process connections. Heavy components and hot surfaces also require appropriate handling and protection. Repairs, heating or machining of rotating components must not be improvised.
What the records should show
The history should identify the installed assembly, authorised operating conditions, inspections, abnormalities and repairs. Corrosion or erosion can affect strength even while the machine continues operating. Their assessment and repair require competent personnel applying the manufacturer’s criteria.
A practical review asks whether a change in product, cleaning or throughput has altered the original conditions. Include the centrifuge’s feeding and discharge systems, rather than examining only the motor visible from the control station. Maintenance and operating personnel need access to the same approved configuration and any restrictions arising from inspection findings.
