🔍 Key Concepts

• Closed feed and condensate system layout and normal flow path • Purpose of a main air ejector after condenser and what comes out of it • Where drains that may still contain condensate under vacuum are usually routed in a closed system

💭 Think About

• In a closed feed system, are you trying to keep condensate and feedwater within the system, or dump them to atmosphere? How does that affect where drains go? • What is special about the after condenser on the air ejector (think: mixture of steam, air, and condensate). Would you want any remaining oxygen/air to go straight back into high‑quality feedwater storage? • Which choice is specifically designed to maintain a water seal/pressure boundary between vacuum equipment and other parts of the system?

✅ Before You Answer

• Identify which option(s) are open to atmosphere versus fully within the closed system • Ask which component’s main job is gas removal and feedwater deaeration, and whether you’d want non‑deaerated drains entering there directly • Consider which component is designed to handle vacuum-side drains and maintain a liquid seal rather than venting to atmosphere