5-276-12-066-002

Built around a two-pass U-bend bundle, this configuration delivers in-tank heating with boiler water in the tubes for demanding service. The bundle mounts through a collar in the tank wall and heats the surrounding fluid by natural convection. Dimensionally it is a 12-inch shell unit, 66-inch shell length, and roughly 66-1/4 inches overall in a 2-pass arrangement. That works out to about 115 square feet of heat transfer surface on 3/4-inch O.D. tubes. Material selection covers cast brass bonnets, steel shell, copper tubes, and brass tubesheets. Design ratings run to 150 PSI on the shell side, 150 PSI on the tube side, and 375°F maximum temperature. This build is designated 5-276-12-066-002. Common applications are hydronic-fed storage systems, domestic water storage heating, and hot water storage tanks.