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Overview	Features	Typical Specifications
Overview U-Tube Heat Exchangers Armstrong U-Tube heat exchangers are designed for durability and include a removable tube bundle as a standard feature. The ‘U’-bend tube design provides a long service life by eliminating the effects of thermal expansion and contraction. It features carbon steel components, 3/4” (19 mm) copper tubes, and a rugged cast iron head. Components are also available in a selection of materials for use in specific applications. Double-Wall, U-Tube Heat Exchangers Double-Wall tube (tube-in-tube design) heat exchangers are designed for applications where it is critical that the system prevent the mixing of internal fluids, i.e. potable water heaters. These units, in the event of a leak, allow the liquid to drain to atmosphere. Made from the same quality components as the W Series, the tube bundle from a WX Series heat exchanger will fit the shell of an existing W Series heat exchanger.				Additional Links PDF Brochures Submittal Data Installation and Operation Guides Images & Drawings Other Information