Tankerman · Cargo Pumps — Cavitation
Cavitation in a cargo pump is best avoided by:
- AMaintaining adequate net positive suction head — controlling discharge rate and keeping suction conditions within limits✓ Correct
- BRunning the pump at maximum speed regardless of level
- CClosing the suction valve partway
- DRemoving the relief valve
Explanation
Cavitation occurs when suction pressure drops below the cargo's vapor pressure, forming vapor bubbles that collapse and damage the pump. Maintaining sufficient NPSH — by managing the discharge rate, suction level, and temperature — keeps the pump out of cavitation.
Authority: Pump theory; cargo handling references
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