What is an essential function of steam traps in a steam system?

Steam traps play a crucial role in a steam system by allowing condensate and air to escape while retaining steam within the system. This function is essential for maintaining the efficiency and effectiveness of the steam system. When steam is generated and travels through the piping, it eventually cools and condenses into water, known as condensate. The steam trap specifically allows this condensate to exit the system, which prevents liquid buildup that could lead to water hammer or operational inefficiencies.

Additionally, steam traps help in the removal of air and non-condensable gases that can accumulate in steam lines. Air can reduce the overall efficiency of heat transfer and steam distribution, while non-condensable gases can create barriers for the steam, leading to energy loss. By holding back steam but allowing air and condensate to exit, steam traps help maintain the necessary pressure and temperature within the system. This ensures that the steam remains effective in conveying heat to intended process equipment, ultimately enhancing operational performance and safety.

In contrast, the other choices do not accurately reflect the primary function of steam traps. For example, while controlling water temperature and increasing steam pressure might be roles of other components in the steam system, they do not pertain to the functions that steam traps provide.