What is the function of the small orifice hole in the top of an inverted bucket?

The small orifice hole in the top of an inverted bucket serves a critical function in ensuring the effective operation of the steam trap system. Specifically, its primary role is to bleed out air from the trap so that the bucket can fall and allow the trap to open.

In operation, the inverted bucket trap relies on the buoyancy of the bucket to manage water and steam. When steam enters the trap, it fills the space beneath the bucket causing it to float. However, if air or non-condensable gases are present, they can prevent the bucket from rising fully, which inhibits the trap from functioning correctly. By allowing air to escape through the orifice, the pressure can adjust, facilitating the proper operation of the trap. This allows the bucket to drop when condensate accumulates, thus triggering the opening mechanism that allows the condensate to exit.

This process is essential for maintaining the functionality of steam systems, enhancing efficiency, and preventing water hammer or flooding in piping by ensuring that condensate is effectively removed.