SU107-4

this configuration is a SU/WU unit built on a removable U-tube bundle for steam-to-liquid heating. Steam condenses in the single-pass shell while the heated fluid travels the tubes. Its envelope centers on a 10-inch diameter shell, 84-inch shell length, and roughly 89 inches overall in a 4-pass arrangement. That works out to about 96 square feet of heat transfer surface on 3/4-inch O.D. tubes. That combination is cataloged as SU107-4. The build specifies cast iron or brass bonnets, steel shell, copper tubes, and brass tubesheets. On the ratings side, expect 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature. Typical duty includes building comfort heating, radiant panel and snow-melt converters, and instantaneous domestic water heating.