5-277-12-048-001

The Diamondback tank heater platform pairs a double-wall two-pass U-bend bundle with proven shell-side baffling, and this configuration applies that design to in-tank heating with boiler water in the tubes and cross-contamination protection. The vented air gap between tube walls gives a visible telltale leak rather than allowing boiler water and tank contents to mix. Dimensionally it is a 12-inch shell unit, 48-inch shell length in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. The build specifies cast iron bonnets, steel shell, and copper (double wall) tubes. Design ratings run to 150 PSI on the shell side, 125 PSI on the tube side, and 375°F maximum temperature. This build is designated 5-277-12-048-001.