In order for the self-cleaning fuel oil centrifuge, shown in the illustration, to properly operate during the desludge cycles, the __________. See illustration MO-0012.
• Self-cleaning fuel oil centrifuge desludging operation and how the bowl opens and closes • Importance of correct bowl locking ring alignment for balanced operation at high RPM • Correct type of lubrication for sliding seals that must move rapidly during the desludge cycle
• Look at the illustration and imagine what actually moves during the desludge cycle—what parts must slide quickly and seal tightly? • For something spinning at very high speed, what could happen if the locking ring were slightly misaligned or if the wrong lubricant were used on the sliding seals? • Which choice (or combination) would most directly affect both reliable opening for sludge discharge and tight sealing when the bowl closes again?
• Confirm how the locking ring alignment marks relate to the bowl’s ability to open/close without vibration or leakage • Consider manufacturer guidance: are high‑temperature lubricating pastes normally preferred over plain lube oil on fast‑moving sealing faces? • Ask yourself whether each option alone is sufficient for proper desludging, or whether all listed conditions must be satisfied together for reliable operation
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