What is use of floating head in heat exchanger?

The tubesheet at the rear header end of the shell is of slightly smaller diameter than the shell, allowing the bundle to be pulled through the shell. The use of a floating head means that thermal expansion can be allowed for and the tube bundle can be removed for cleaning.

What is a floating head?

Definition of floating head : a flesh hoop of a drum entirely free from the shell.

What is a floating tube sheet in a heat exchanger?

A floating tubesheet style heat exchanger consists of a removable tube bundle made up of straight tubes, tubesheets, tie rods and baffles. The name floating tubesheet comes from the fact that the tubesheet on the tail end of the exchanger is not fixed in place, like the one on the front end of the bundle.

What is channel head in heat exchanger?

Channels (Heads) Channels or heads are required for shell-and-tube heat exchangers to contain the tube side fluid and to provide the desired flow path. Many types of channels are available.

How many gaskets are in a floating head exchanger?

This joint has two gaskets, one between the shell flange and tube-sheet, and the other between the tube-sheet and the channel flange. Both gaskets are compressed by a single set of fasteners.

What is the purpose of tube bundle?

Tube bundles aid in heat transfer within the device offering larger heat transfer surface area. They are used for the following purposes: HVAC applications. Compressor cooling.

How many gaskets are in a floating head heat exchanger?

This joint has two gaskets, one between the shell flange and tube-sheet, and the other between the tube-sheet and the channel flange. Both gaskets are compressed by a single set of fasteners. These are exposed to the atmosphere; the pressure is only internal.

What is pull through floating head?

Floating head designs of head exchangers The simplest is a “pull-through” design which allows the tube bundle to be pulled entirely through the shell for service or replacement. In order to accomodate the rear head bolt circle, tubes must be removed resulting in a less efficient use of shell size.

What is a channel head?

A channel head is the upstream-most point of concentrated water flow and sediment transport between definable banks with a longitudinally continuous channel downstream.

What is test ring in heat exchanger?

Test rings allow the owner/user of a shell and tube heat exchanger to hydrotest the tube bundle while it’s outside of the exchanger.

What is gasket in heat exchanger?

Heat exchanger gasket is a term used for gaskets used in shell and tube type heat exchangers. This is usually a metal jacketed gasket with a soft filler for higher temperatures. These gaskets are used in areas where extreme temperatures and excessive movement due to thermal expansion exist.

What is a tube bundle heat exchanger?

As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. The set of tubes is called a tube bundle, and may be composed of several types of tubes: plain, longitudinally finned, etc.