HTWU89-24

The HTWU platform pairs a removable U-tube bundle with proven shell-side baffling, and this configuration applies that design to high-temperature water heating. High-temperature water flows through the tube side, so the heads rather than the shell set the pressure limit. Dimensionally it is a 8-inch shell unit, 108-inch shell length, and roughly 113-1/8 inches overall in a 2-pass arrangement. That works out to about 75 square feet of heat transfer surface on 3/4-inch O.D. tubes. 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. Installations range across converter duty on HTHW loops, campus and district energy systems, and high-temperature hot water distribution. This build is designated HTWU89-24.