Engineering · Auxiliary — Purifier
In a centrifugal oil purifier, the function of the gravity (dam) disc is to:
- ADrive the bowl
- BSet the position of the oil/water interface within the bowl✓ Correct
- CHeat the oil
- DFilter solid particles only
Explanation
The gravity disc diameter sets the radial position of the oil-water interface. It must be matched to the oil's density — too large or too small moves the interface and causes the purifier to lose its water seal or discharge oil with the water.
Authority: Modern Marine Engineer's Manual; centrifugal separation
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