What is the main purpose of a steam trap in a steam system?

• A. To generate additional steam
• B. To maintain high pressure in the boiler
• C. To remove condensate and non-condensable gases
• D. To control the temperature of the steam

Answer: (C)

The main purpose of a steam trap in a steam system is to remove condensate and non-condensable gases. Steam traps work by allowing condensate—water that has formed from steam as it cools and loses temperature—to drain from the steam piping while preventing the escape of steam itself. This process is essential for maintaining an efficient steam system because trapped condensate can reduce heat transfer efficiency and cause water hammer, which can lead to damage in the piping and fittings.

Additionally, steam traps help to eliminate non-condensable gases, such as air, from the system. These gases can reduce the quality and thermal efficiency of the steam, leading to increased energy consumption and reduced performance of the steam system overall. By effectively managing condensate and non-condensable gases, steam traps contribute to the safety, efficiency, and longevity of the steam system.