These units are most often used as oil coolers or air coolers. The floating head is generally sealed with an O-Ring. Tubes may be chemically cleaned, water blasted or steam cleaned.īEW/AEW- These are straight tube units with one floating head and one stationary head. You can remove the bundle from the shell, however to replace the bundle, the inlet Bonnet is included or you must cut off the tubesheet. they generally can not be used when a temperature cross occurs).ĬEU- This design has the tubesheet welded to the Bonnet. These units must have an even number of tube passes, sometimes limiting their applicability to a service(e.g. Tubes may be water blasted, steam or chemically cleaned. They are generally less cost effective than non removable designs.īEU/AEU- U Bundle Exchangers are generally the most cost effective design style of removable bundle exchanger. Removable bundle exchangers give the customer the ability to replace the tube bundle without replacing the shell or Bonnets. The first letter identifies the front head, the second letter identifies the shell type and the third letter identifies the rear head type. Heat Transfer Heat Exchangers TEMA Designīecause of the number of variations in mechanical designs for front and rear heads and shells, and for commercial reasons, TEMA has designated a system of notations that correspond to each major type of front head, shell type and rear head.
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