Which type of steam trap is known for its mechanical operation?

The float trap is known for its mechanical operation because it utilizes a buoyant device—usually a float—that rises and falls with the level of condensate within the trap. As condensate collects, the float rises, and when it reaches a certain level, it activates a valve that opens, allowing the condensate to drain out. When the level drops, the float descends, closing the valve to prevent steam loss. This mechanical movement directly corresponds to the level of water present, making float traps very effective in automatically discharging condensate while keeping steam within the system.

In contrast, other types of traps operate based on different principles. Thermostatic traps adjust based on temperature changes; bimetallic traps utilize the expansion and contraction of two different metals to open and close a valve; and hydrodynamic traps rely on the speed of the steam and condensate flow for their functional operation. These methods do not involve the simple mechanical action of a floating device, which is why the float trap stands out for its mechanical mechanism.