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← TechnologyWhich outcome develops when a rotary vane vacuum pump operates with prolonged gas ballast valve activation?
A)Accelerated oil degradation and reduced vacuum✓
B)Overheating of motor windings and pump seizure
C)Increased pump noise due to vane cavitation
D)Increased backstreaming due to check valve failure
💡 Explanation
When a rotary vane vacuum pump uses prolonged gas ballast, contamination dilutes the pump oil because non-condensable vapor is mixed, leading to oil degradation and reduced ultimate vacuum. Therefore, oil degradation and vacuum reduction result, rather than overheating, noise, or backstreaming which involve different mechanisms and components.
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