5-267-04-060-001

Configured for liquid-to-liquid transfer with cross-contamination protection, this configuration carries the double-wall U-tube bundle construction that defines the Diamondback DSU/DWU range. Each tube is vented to atmosphere through a diamond-pattern air gap, so a failure in either wall reports itself outside the unit. The configuration measures 4 inches across the shell, 60-inch shell length in a 2-pass arrangement. It carries 3/4-inch O.D. tubes. The build specifies cast iron bonnets, steel shell, copper (double wall) tubes, and naval brass tubesheets. Design ratings run to 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature. Common applications are potable water heating and cooling, glycol-to-potable loops, and domestic water systems under double-wall codes. This build is designated 5-267-04-060-001.