● The shell pass of a double shell-pass heat exchanger is divided into two parts through a partition board, which means the medium goes around inside. Double tube-pass and double shell-pass heat exchanger is a tube-shell type heat exchanger of pure counterflow heat exchange design. In a double tube-pass and double shell-pass heat exchanger, the fluid in the shell pass can generate, at very low speed, turbulent flow, which improves convective heat transfer coefficient.

● Funke has solved the problem of assembly sequence of double shell pass; it suggests meticulous quality control procedure, laying solid foundation for production of high-quality products.