5-267-04-084-001

This configuration is a Diamondback DSU/DWU unit built on a double-wall U-tube bundle for liquid-to-liquid transfer with cross-contamination protection. 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, 84-inch shell length in a 2-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. On the ratings side, expect 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature. Common applications are process cooling where mixing cannot be tolerated, domestic water systems under double-wall codes, and glycol-to-potable loops. This build is designated 5-267-04-084-001.