5-262-10-120-002

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. The configuration measures 10 inches across the shell, 120-inch shell length in a 4-pass arrangement. It carries 3/4-inch O.D. tubes. Material selection covers cast iron bonnets, steel shell, copper (double wall) tubes, and naval brass tubesheets. Design ratings run to 150 PSI on the shell side, 125 PSI on the tube side, and 375°F maximum temperature. Typical duty includes health care and institutional plumbing, domestic hot water where codes require double-wall separation, and potable water heating. This build is designated 5-262-10-120-002.