Cores are removable from the front of the housing without disassembly of the gas duct. The housing is designed based on the ASME Section VIII, Div. 1 pressure vessel code. A code stamp is available as an option.
The fins are rectangular plates, with a matrix of die-extruded tube collars. A sheet metal casing provides rigidity to the fin-tube assembly prior to tube expansion. After assembly, the tubes are expanded into the fin collars. This allows for a gap-free connection maximizing heat transfer and structural integrity.
The fluid circuit consists of several parallel tube circuits, which are joined at inlet and outlet headers. The circuits are designed to work "down hill" to prevent trapping. To assure complete drainage, optional intermediate drain headers are available. Attached to the 180° return bends, the drain headers provide positive water drainage and protection from freeze-up.
The company's engineers use a computer model to analyze heat transfer performance. A specifically designed program calculates housing material thickness based on the ASME code. As with all company equipment, the design performance is guaranteed.
Xchanger, Inc., 1401 South 7th St., Hopkins, MN 55343-7868. Tel: 612-933-2559. Fax: 612-933-5647.