5-268-12-108-003

For high-temperature water heating, the HTWU line offers a removable U-tube bundle design; this configuration sits within that range. High-temperature water flows through the tube side, so the heads rather than the shell set the pressure limit. Dimensionally it is a 12-inch shell unit, 108-inch shell length, and roughly 114 inches overall in a 6-pass arrangement. That works out to about 156 square feet of heat transfer surface on 3/4-inch O.D. tubes. That combination is cataloged as 5-268-12-108-003. The build specifies cast iron bonnets, steel shell, copper tubes, and steel tubesheets. Design ratings run to 150 PSI on the shell side, 400 PSI on the tube side, and 375°F maximum temperature.