What is the function of the thermostatic element in a float and thermostatic steam trap?

The function of the thermostatic element in a float and thermostatic steam trap is to allow air to pass through the trap. The thermostatic element plays a crucial role in the trap's ability to separate condensate and air from the steam. When the temperature within the trap drops—usually due to the presence of condensate—this element responds by opening, thereby permitting air and non-condensable gases to be expelled from the system. This is essential for effective steam distribution and to maintain system efficiency.

By efficiently venting air, the thermostatic element ensures that the steam system operates at optimal conditions. If air and other gases are allowed to remain trapped, it can lead to issues like decreased heat transfer, which can affect the overall performance of the steam system. This functionality is particularly important in a balanced steam system where effective condensate removal and venting of air contribute to positive steam flow and system reliability.

The other options do not accurately describe the role of the thermostatic element. While regulating steam pressure, maintaining water levels in the boiler, and removing steam from the system are important aspects of steam management, they fall under the purview of different components and mechanisms within the steam system.