Bestobell’s IB18V Series vertical style inverted bucket traps are ideal for general condensate removal service and feature a heavy-duty cast iron body and stainless steel bucket for long-term operation and reliability. For process, heating and dripleg services with pressures to 250 psig (17,2 bar). Available in 1/2″ through 2″ sizes.
Inverted bucket steam traps operate on the simple principle that steam, a gas, will provide buoyancy to an inverted bucket in water. The bucket, due to its weight, is submerged within a “prime” of water. The bucket pulls down on a lever system and holds the discharge valve open, allowing flow and discharge of condensate through the trap. When steam enters the trap, it collects in the inverted bucket causing it to become buoyant. The bucket floats upward closing the discharge valve through the linkage arrangement. When condensate again enters the trap, and as the steam under the bucket condenses, the weight of the bucket, multiplied by the linkage’s leverage, exceeds the differential pressure holding the valve plug to the valve seat, and the bucket sinks. This opens the valve to discharge condensate and accumulated non-condensable gases. As the condensate drains and the steam enters the trap, the cycle repeats.