5-267-12-108-002

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. Dimensionally it is a 12-inch shell unit, 108-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. On the ratings side, expect 150 PSI on the shell side, 125 PSI on the tube side, and 375°F maximum temperature. This build is designated 5-267-12-108-002. The series sees regular use in glycol-to-potable loops, potable water heating and cooling, and domestic water systems under double-wall codes.