Shell and Tube Heat Exchangers
Armstrong Shell and 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. Armstrong Shell and Tube Heat Exchangers feature 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 Shell and Tube Heat Exchangers
Armstrong Double-Wall (tube-in-tube design) Shell and Tube heat exchangers are designed for applications where it is critical that the system prevent the mixing of internal fluids, i.e. potable water heaters. Double-Wall Shell and Tube Heat Exchangers, 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 Double-Wall Shell and Tube Heat Exchanger (WX Series) will fit the shell of an existing W Series heat exchanger.
Typical Heating Circuit
Armstrong type "WS" and "W" Series Heat
Exchangers are of shell and tube type, designed
for instantaneous heating or cooling of water or
other liquids. A popular application of the "WS" exchangers
is the heating of water with steam for hot water
radiation. Armstrong "W" type exchangers are
used for heating or cooling various fluids, in
applications ranging from swimming pools to
industrial processes. Construction of these units
depends on the fluids used in both the shell and
the tubes.
Both types of exchangers are available in either
2- or 4-pass construction, the "U"-bend tubes
are roller-expanded into a stationary tubesheet.
This design allows for the expansion and
contraction caused by temperature variations. Units can be connected to any steam boiler or system; however, the capacity of the boiler must be sufficient to handle the load imposed by the heat exchanger. In addition, some method of controlling the flow to the exchanger must be provided and installed according to
manufacturer's directions.
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