Bucket Type Steam Trap

This type of trap has the advantage that simple and compact structure such as moving part is disc only.

Bucket type steam trap.

The inverted bucket steam trap is very robust unaffected by corrosion and has an excellent ability to handle dirt. In contrast inverted bucket type traps typically include an internal weep hole to bleed off steam or air continuously and with each cycle. 1 float thermostatic 2 inverted bucket inverted bucket traps as their name suggests operate like an upside down bucket in water. Steam enters the trap body and heats the volatile liquid in the sealed bellows causing expansion of the bellows.

They open and close gently minimizing wear. During startup the trap is filled with water with the bucket a at figure 2 air trapped in the bucket escapes through a vent hole c. In the case of the trap shown in the image on the right flot trap with air cock condensate reaching the trap will cause the ball float to rise lifting the valve off its seat and releasing. There is a vent hole in the top of the bucket that allows a small amount of the vapor.

The orifice which is located in the upper part of the body is controlled by the vertical movement of the inverted bucket. Bellows type steam trap a bellows type steam trap is illustrated in figure 3. There are two basic types of mechan ical steam traps. Armstrong inverted bucket steam traps open and close based on the difference in density between condensate and steam the inverted bucket principle.

Air is vented through the small hole in the top of the inverted bucket. Additionally the intermittent action of the inverted bucket trap makes it typically respond slower than the free float which operates immediately due to its self. The weep hole is usually small enough to prevent significant steam loss but it removes only a limited amount of air which can hinder system start up or heat transfer on equipment. Disc type steam trap has been widely used because it is small lightweight less mounting space and no restriction on mounting direction.

The operation of this trap is controlled by the expansion of the vapor of a volatile liquid which is enclosed in a bellows type element. When steam or air flows into the underside of the inverted bucket and condensate surrounds it on the outside the steam causes the bucket to become buoyant and rise. This simple fact means that inverted buckets are subject to less wear than some other types of traps. They can continuously pass large volumes of condensate and are suitable for a wide range of process applications.

In this position the bucket will cause the trap valve to close. Types include ball float and inverted bucket steam traps. Ball float steam trap.