5-277-08-042-001

A double-wall two-pass U-bend bundle gives this configuration the thermal and mechanical margin expected of Diamondback tank heater equipment in 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. Its envelope centers on a 8-inch diameter shell in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. That combination is cataloged as 5-277-08-042-001. Standard construction uses cast iron bonnets, steel shell, and copper (double wall) tubes. Operating limits are 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature.