What kind of steam trap features a movable disc that regulates air and condensate discharge?

The correct answer is thermodynamic steam trap. A thermodynamic steam trap operates based on the principle of differential pressure between steam and condensate. It utilizes a movable disc that opens and closes to regulate the discharge of both air and condensate. When steam enters the trap, it creates a pressure differential that lifts the disc, allowing condensate to escape. Once the steam is released or condensate fills the trap, the pressure equalizes, and the disc closes to prevent steam loss.

This mechanism allows for efficient operation since it can effectively manage air venting, which is crucial for maintaining system efficiency and preventing issues such as water hammer or air binding in steam systems. The design of the thermodynamic trap makes it particularly suitable for applications where space is limited and where it is important to avoid any valve failures.

Other types of steam traps, such as mechanical, float, and inverted bucket traps, employ different operational principles. For instance, mechanical traps rely on moving parts like levers or weights to open and close discharge ports, while float traps use the principle of buoyancy to allow condensate to leave the system. Inverted bucket traps utilize a buoyant bucket that rises and falls with the water level, but they do not feature a movable disc mechanism specifically for