U Tube bundle Heat Exchangers consistings of a bundle of U tubes surrounded by a shell. One fluid flows through the tubes and the other fluid flows through the shell. Around the tubes, multitherm can duplicate any existing bundle to include dimensions, materials and performance. We can build U tube bundles or straight tube floating tube bundles. We can retube fixed tubesheet heat exchanger when the bundles is not removable. Most bundles tend to be build with copper tubes and steel tubesheets.

There can be many variations on the shell and tube design. Typically the ends of each tube are connected to plenums through holes in tubesheets. The tubes may be straight or bent in the shape of U called U-tubes. In nuclear power plants called pressurized water reactors and large heat exchangers called steam generators are two-phase. Shell and tube heat exchangers which typically have U-tubes.