There are many types of heat exchangers out there, and the most common heat exchanger for high-pressure applications is the shell and tube heat exchanger. It’s name pretty much give this heat exchanger away, it consists of a shell, which is the pressure vessel, and contains a bundle of tubes inside the shell. Fluid A runs through the tubes, while Fluid B flows over the tubes (through the shell) and then the heat is transferred between the two fluids.
Koss Industrial, Inc. engineers and manufactures shell and tube heat exchangers, also know as u-tube heat exchangers. Pictured here is Koss’ version of a shell and tube heat exchanger, a u-tube heat exchanger model number HXU2.5-6X60.