The primary function of a steam trap is to:

The primary function of a steam trap is to remove air and non-condensable gases from the steam system. This is essential for maintaining efficiency in steam heating systems. When steam is generated, it contains not only steam but also air and other gases that can hinder the system's performance. If these gases accumulate, they can lead to reduced heat transfer efficiency, lower system effectiveness, and potentially even damage the equipment.

By removing these non-condensable gases, steam traps help to ensure that steam can pass through the system effectively, thus optimizing the heating process. This is crucial because the presence of air can cause steam bubbles to form, which act as insulation and reduce the heat transfer capabilities of the steam to whatever surface it is meant to heat.

In contrast, maintaining high pressure or increasing water level is not a direct function of a steam trap, as that would typically involve different components within the steam system. Similarly, while steam traps are designed to handle condensate, they do not primarily work to reduce steam temperature; instead, they allow condensate to drain while maintaining the flow of steam. Thus, the role of a steam trap in removing air and non-condensable gases is vital for the overall efficiency and safety of steam systems.