What is the primary function of a steam trap in a steam system?

The primary function of a steam trap in a steam system is to remove condensate and allow steam to pass. In steam systems, when steam is utilized for heating or processing, it loses heat and begins to condense back into water. This condensate, if not effectively managed, can lead to various operational issues such as water hammer, reduced efficiency, and potential damage to the equipment.

Steam traps are specifically designed to selectively allow condensate to be drained while preventing the loss of live steam. This is critical because it helps maintain system efficiency and effectiveness. By removing the condensate, steam traps also help in keeping the system at the appropriate pressure levels needed for optimal performance.

The other functions mentioned in the other options do not align with the role of a steam trap. Creating steam pressure is part of the steam generation process, cooling steam is typically not necessary as steam is used in its gaseous form for efficiency, and increasing steam flow relates to steam generation or control systems rather than the specific role of steam traps. Thus, the key function of a steam trap is accurately captured as the removal of condensate while allowing steam to pass.