Polytetraflon® Shell and Tube Heat Exchangers
Polytetraflon® Plastic Heat exchangers Type Shell and tube Heat exchanger
Shell and tube heat exchangers consist of an external shell tube and internal multiple hoses which consist of a large number of hoses of small nominal diameter. The internal hoses are welded in two perforated bases, which are then welded to the external shell tube. The first medium flows through the external shell tube and the second medium flows through inside the hoses. The hotter medium is cooled down and the cooler medium is heated up in this operation.
The number of external and internal passages can vary while doing so, according to the application. The media are mainly conducted in the counterflow or cross-counterflow, in order to achieve an optimum transfer of heat.
The Polytetraflon® shell and tube heat exchangers are manufactured completely from the Fluoropolymers PFA, ECTFE and PVDF as well as the PP polyolefine. Possible contamination by other materials is prevented because of that. All of the welded connections for conducting the media internally are manufactured in the contactless IR butt-welding process: this is particularly important when using pure media and the purest media because this welding process avoids dead spaces which can lead to bacterial contamination for example. All of the IR welds are computer- aided and the welding parameters of all the connections are documented. In addition, all heat exchangers are pressure-tested internally and externally.
Configurations and structural shapes
The Polytetraflon® shell and tube heat exchangers are manufactured with an internal passage and an external passage as standard. They are fabricated by being completely jig-welded in the sealed configuration or structural shape. Configurations or structural shapes that are openable on one side or both sides can be realized by the utilization of fixed or loose flanged connections. The utilization of changeable multiple tubes is also possible in this case.
Lateral connecting ring
As a result, the external medium is not conducted in the internal hoses directly but guided and conducted through a lateral connecting ring on the side around the sheathing tube. The mechanical loading is reduced on the hoses because of that and the service life is increased.
The position and the type of lateral connections can be designed for the specific
customer. The connections for the internal passage of media can be fitted straight or laterally outgoing with connections which are designed for the specific customer.
|Material||Maximum nominal diameter in mm||Maximum length in mm||Maximum exchange surfaces in sq.m.|
||3000 mm||7 sq.m.
||5000 mm||35 sq.m.
||5000 mm||107 sq.m.
||5000 mm||92 sq.m.|
Please use the heat exchanger configurator