Which device has the secondary function of removing air condensable gases from the steam system?

• A. Steam Trap
• B. Deaerator
• C. Attemperator
• D. Burner Valve

Answer: (A)

In a steam system, you want to remove condensate while also venting air and other non-condensable gases that can accumulate in the lines. A steam trap is designed to discharge condensate and, importantly, let these non-condensable gases escape, preventing them from hindering heat transfer or causing corrosion. That practical function—removing air and non-condensable gases from the steam system—happens as a secondary role of the steam trap.

The other devices have different primary purposes: a deaerator handles removing dissolved gases from feedwater before it enters the boiler, not from the steam line itself; an attemperator controls steam temperature by cooling or mixing with condensate; and a burner valve regulates fuel to the burner.