Answer Posted / swaroop

Vacuum balancing line is required in CEP suction to avoid cavitation and provide positive suction to CEP. As CEP takes suction from HOTWELL (which is also in vacuum), So there will be -ve pressure at suction. As it is well known that at less pressure boiling point of water is also less. Hence the condensate will try to vapourize at low pressure which will cause cavitation and pump will get damaged. Hence a vacuum balancing line ( A canister vent ) is provided at CEP suction to remove vapours which will directly go to condenser(which is in vacuum).


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