PRODUCT DESCRIPTION TALOS DUAL tubes consist of two seamless metallic layers, an inside layer made from copper and an outside layer made from aluminum. The two layers are unified by strong metallurgical bonds between the copper and the aluminum. This fundamental material unification enables the TALOS DUAL tube to behave like a seamless homogeneous tube, exhibiting however unique properties that originate from its constituents.

The advantageous characteristics of each of the two constituent materials are unified into the TALOS DUAL tubes. The inside layer of TALOS DUAL made from copper, provides high strength, durability and excellent corrosion resistance, and ensures the compatibly with copper-based HVACR systems by being connected with copper tubing or other elements made from copper and copper-alloys (e.g. brass).

At the same time, the outside layer of TALOS DUAL made from aluminium, contributes in the strength resistance of the tube and offers price and weight reductions. When TALOS DUAL is joined externally with other aluminium elements, as for example with the aluminium fins of a heat-exchanger coil, or the aluminium absorber sheet of a solar collector, the external layer of aluminium enables an optimum material combination.

APPLICATIONS

TALOS DUAL tubes are supplied in standard sizes used in the HVACR industry or in customised sizes for OEM applications that require a "tailor-made" combination of properties like pressure resistance, flexibility, heat conductivity, weight per meter etc.

TALOS DUAL may be processed using methods and tooling similar to copper tubes (e.g. cutting, expanding, bending, etc.) at the same levels of high productivity.

TALOS DUAL tubes may be joined with copper tubes and other copper elements (e.g. copper return bends in heat exchangers) by expanding the tube end and exposing the internal copper layer of TALOS DUAL for a copper-to-copper contact.

Commercially available silver-bearing solders for HVACR applications may be used, together with a suitable flux, to produce a copper-to-copper joint and maintain the copper continuity inside the network of tubes and system components. Silver-bearing solders have a history of use throughout the HVACR industry worldwide due to their versatility, ductility and strength. Since soldering requires low thermal energy input, it does not affect the parts in the joint and so preserves the unique properties of TALOS DUAL. Alternatively, Zinc/Aluminum brazing alloys may be used for joining TALOS DUAL to copper or TALOS DUAL to aluminium. Zinc/Aluminum alloys have been developed for use in the refrigeration and A/C industry for joining copper to aluminium. Depending on the particular connection and the application requirements, different alloys are recommended:
 

All of the above alloys required the use of an appropriate flux.

TALOS DUAL tubes are supplied depending on the application in either PNC coils, LWC coils or straight lengths, with smooth or grooved inner surface, plain or pre-insulated on the exterior with a high-performance thermal insulation made from cross- linked polyethylene (PEX) foam.

ADVANTAGES

• Retention of the advantageous properties of copper
• Lower total price compared to copper(per meter)
• Reduced weight per meter
• Product can be optimally tailored-made
• Balanced material combination within HVACR systems and components

MATERIAL

• High Purity Copper (with a minimum 99.9% copper content)
• Aluminum or Aluminum Alloy (with a minimum 99.7% aluminum content)

Values are listed, as obtained under standard laboratory conditions and may be amended, without prior notice.

PRODUCT SPECIFICATIONS

Company standard TB 0

The TALOS DUAL tube range for ACR installations is currently under approval by the German TUV certification body (Ref. No: 1326W151500_R1).

TALOS DUAL is the optimum solution for connecting split-type air-conditioning units because it is designed to retain the copper advantages. The internal layer of TALOS DUAL made from high purity copper and of high surface cleanness acc.to EN-12735, conveys the refrigerant through the network of copper tubes in the system. Because the inside copper layer comes into contact with the brass connection fittings, the internal copper continuity of the A/C system is retained. For the external protection of the connection, the TALOS DUAL tube is complemented with two alternative systems; an application-specific heat-shrinkable jacket, or a purpose-made brass flare nut:

• The heat-shrinkable jacket is used together with the standar- dized flare nut that is fitted on the A/C units. The jacket covers externally the joint and has an internal adhesive coating that, when heated, melts and flows to form a positive environmental seal. The coating adheres to the outer layer of TALOS DUAL, as well as, the brass flare nut, creating a durable barrier to moisture penetration. The durable protection of the jacket has been proven by accelerated corrosion testing in salt-fog chamber following the industry standard ASTM B-117 test procedure. This specific type of jacket is supplied by HALCOR in packaged ready-to-use pre-cut lengths.
• The specially-designed flare nut is used as a replacement of the standardized flare nut that is fitted on the A/C units. The nut consists of a brass body with an integrated polymeric adapter and an elastomeric O-ring seal. The design of the flare nut isolates the brass and aluminium materials and thus protects the connection against the external environment, as proven by accelerated corrosion testing in salt-fog chamber according to ASTM B-117. This purpose-made flare nut is supplied by HALCOR for each size of TALOS DUAL tube, and is also compatible with standardized copper tubes.

Both connecting proposals for installing TALOS DUAL to A/C systems ensure a long-term durability of the connection. The choice is up to the installer, if he prefers to keep the flare nut provided with the system and apply the heat-shrinkable jacket, or to use the replacement flare nut provided by HALCOR instead. The final result is an inner copper system with additional external protection.