For what main purpose is the bellows in a thermostatic steam trap utilized?

The bellows in a thermostatic steam trap is primarily used to sense temperature changes within the system. When the temperature of the steam or condensate changes, the bellows expand or contract in response to the variations in temperature. This mechanical action allows the trap to open or close accordingly, ensuring that condensate is efficiently removed while preventing steam loss. By accurately sensing temperature, the bellows help maintain the effectiveness of the steam trap in managing unwanted condensate and ensuring optimal performance of the steam system.

Other options focus on functions that do not accurately reflect the role of the bellows. Gauging water levels is more related to different types of devices designed specifically for that purpose. Measuring pressure typically involves pressure gauges or sensors rather than a mechanical element like bellows used in a thermostatic context. Controlling steam generation is handled by other components in the system, such as control valves and regulators, not directly by the thermostatic steam trap.