RefHP® (Serie 29000) | Copper

In air conditioning and refrigeration technology, particularly in commercial and industrial refrigeration systems, environmentally friendly solutions are becoming more and more important. Optimum results can be obtained by an increase in efficiency and the use of ecologically safe refrigerants such as CO2 (R744), which are mainly used in the transcritical part with higher operating pressures. However, the use of CO2 leads to higher operating pressures potentially up to 130 bar.

Specifically designed for high pressure operations

SANHA RefHP® fittings are specifically designed for such operating pressures. They are ideally suited for pipes in refrigeration systems with a maximum operating pressure of up to 130 bar (other pressures on request), a minimum temperature of -196 °C and a maximum temperature of 150 °C for fluids in Group 2 according to European Pressure Equipment Directive (PED 97 / 23 / EC). Dimensions and tolerances for capillary joints in accordance with the EN 14276-1, Annex B with pipes according to EN 378-2 and EN 14276-2.

Practical tip for processing

Fittings and pipes must be connected with silver solder with min. 2 % Ag according to EN ISO 17672 (SANHA article number 84938). We also recommend the use of a flux FH 10 in accordance with DIN EN 1045 for brazing of copper alloys. The installation of the fittings must be in compliance with all relevant technical rules and regulations, in particular DIN EN 378-2 "Refrigeration systems and heat pumps", must be followed in detail. SANHA RefHP fittings are marked with the engraving "SA CuFe" and the respective dimension.

General advantages of our high pressure solder fittings

• Ideal for use in high-pressure applications such as refrigeration and air-conditioning systems, especially for CO2 systems
• Suitable for pressures of 90 and even up to 130 bar
• RefHP® fittings are compatible with all four CuFe pipe types available on the market, offering a high degree of flexibility:
  • KME – CL12
  • HALCOR – TALOS XS
  • Mueller - XHP
  • Wieland K65
• SANHA has more than 50 years of experience in the production of solder fittings and maintains very close manufacturing tolerances
• Highest European quality through production at our own plant in Ternat, Belgium
• Wide range of fittings up to 2 5/8” in copper-iron. Special fittings for refrigeration unit manufacturers.
• Optimum cleaning of the fittings results in a carbon value of <0.5 mg C/dm². This is decisive for the quality of the soldered connection as carbon residues can lead to pitting corrosion at higher soldering temperatures
• Easy recognition before and after installation: Pipes and fittings are clearly marked so that all components can be identified at a glance. In addition, the material is slightly magnetic and can be easily distinguished from copper using a neodymium magnet – a very practical advantage!
• Corrosion-proof material
• The highly stable CuFe2P ensures easy and cost-effective installation
• Excellent machining properties, no toxic chemical elements
• Makes a significant contribution to an energy-efficient and environmentally-friendly cooling system:
  • Compared to conventional systems, as much as 25 % energy can be saved in transcritical CO2 systems!
  • This is particularly important for supermarkets, where cooling systems operate 24/7

• Suitable for installation under the European Pressure Equipment Directive
• Transition fittings available in metric sizes

Advantages of copper-iron over TIG welding of stainless steel

Cost savings through time savings:

• Copper-iron can be brazed and this technique is much simpler than TIG welding
  • Brazing is 2.5x faster than TIG welding
• Cost savings through labour costs:
  • TIG welders command higher hourly rates than employees who can solder/braze
  • Because of the faster technique of soldering, the total hourly labour cost will be much lower
  • Cost savings through reduction of general costs:
  • TIG welders are required to undertake an annual training that is expensive and time consuming
  • Many companies rely on subcontractors for TIG welding as they do not have any employees themselves. This cost is therefore eliminated

Advantages of copper-iron over brass

• Brass has to be heated more slowly and carefully: Time savings up to 25 %
• Brass must be soldered with a higher silver content (lower working point) which is more expensive: CuFe = 2-5 % silver, Brass = 15 % silver

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