Inverted bucket traps rely on the density difference between steam and water to drain condensate as it forms. An inverted bucket floats in condensate that surrounds the bucket. As the bucket moves up and down in the condensate, a linkage connected to the bucket closes or opens a discharge valve trapping the condensate or allowing it to escape.
The inverted bucket trap has only two moving parts – the valve lever assembly and the bucket. That means no fixed points, no complicated linkage, nothing to stick, bind or clog.