5-262-04-072-011

For steam-to-liquid heating with cross-contamination protection, the Diamondback DSU/DWU line offers a double-wall U-tube bundle design; this configuration sits within that range. An atmospheric air gap between the inner and outer tube vents any breach to the outside, giving a visible telltale leak instead of silent mixing. Physically, the unit runs a 4-inch shell, 72-inch shell length in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. That combination is cataloged as 5-262-04-072-011. As furnished, materials include cast iron bonnets, steel shell, copper (double wall) tubes, and naval brass tubesheets. The unit is rated for 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature.