5-267-12-084-002

For liquid-to-liquid transfer with cross-contamination protection, the Diamondback DSU/DWU line offers a double-wall U-tube bundle design; 5-267-12-084-002 sits within that range. Each tube is vented to atmosphere through a diamond-pattern air gap, so a failure in either wall reports itself outside the unit. Dimensionally it is a 12-inch shell unit, 84-inch shell length in a 4-pass arrangement. It carries 3/4-inch O.D. tubes. Standard construction uses 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. The series sees regular use in glycol-to-potable loops, domestic water systems under double-wall codes, and process cooling where mixing cannot be tolerated.