Fixed tube sheet type: This design with rigid structure is typically suitable for applications where the temperature difference between the shell and tube does not exceed 50°C. This design owns the ideal economic efficiency.
U-tube type: Tube bundle U-shaped structure is no thermal stress. Both tube and shell sides can withstand high pressure with  satisfied economic efficiency. The tube bundle can be taken out, and the outside of the tubes and shell can be cleaned easily.
Filling function type: The one side of tube bundle can extend flexibly without thermal stress. Compared with the floating head design, it has a simpler structure and lower cost.
Floating head type: Both tube and shell sides can withstand high pressure. The tube bundle can be cleaned in    mechanical way.