Which statement best describes the Non-Condensable Gases Removal System?

• A. It removes non-condensable gases and vents to gland exhaust
• B. It cools the steam with condensate
• C. It stores non-condensable gases temporarily
• D. It increases boiler pressure

Answer: (A)

Non-condensable gases in a steam plant—air and other gases that don’t condense with the steam—reduce heat transfer and condenser efficiency if they’re allowed to accumulate. The Non-Condensable Gases Removal System is specifically designed to purge these gases from the system and vent them away through the gland exhaust. By continuously removing these gases, it helps maintain a strong condenser vacuum and smooth operation, avoiding the problems these gases cause. It isn’t about cooling steam with condensate, it isn’t for storing non-condensables, and it doesn’t raise boiler pressure.