Which function is performed by the float mechanism in a float and thermostatic trap?

The function performed by the float mechanism in a float and thermostatic trap is to control water level and discharge condensate. In steam systems, condensate must be effectively removed to maintain efficiency and prevent damage. The float mechanism responds to the water level within the trap; as water collects, the float rises and triggers the discharge of condensate, ensuring that the steam line remains appropriately cleared of water. This operation not only helps prevent water hammer, which can lead to damage or inefficiency in the system, but also ensures optimal functioning of steam heating systems.

The other functions listed do not pertain to what the float mechanism specifically does. Regulating steam pressure is typically managed by different components, heating the trap body may be a function related to maintaining the proper temperature of condensate, and acting as a safety release generally involves other safety mechanisms to handle excess pressure or temperature.