Refrigeration and Air Conditioning
Depending on the requirements, a combination of copper or silver brazing alloys—selected to suit the material—is used along with the appropriate brazing flux. Stainless steel and aluminum materials place higher demands on the brazing process and require the use of special brazing alloys and fluxes designed for highly corrosion-resistant materials. Brazed joints between material combinations—such as copper and stainless steel—can be achieved using silver brazing alloys with a high silver content.
Discover ProductsSelect a soldering method for refrigeration and air conditioning applications
Certified Environmental Management System in accordance with DIN ISO 14001
FELDER GMBH places great importance on the responsible use of natural resources. Through our ISO 14001 certification, we commit to regularly demonstrating our active commitment to the environment and nature in an official and transparent manner.
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FELDER Recycling
When it comes to the metal “tin,” FELDER GMBH ranks among the top three companies in Germany in terms of the use of recycled raw materials. FELDER Recycling specializes exclusively in the recycling of tin-based solder waste and has been certified as a specialized waste management company since June 2000.
Product Highlights in the Refrigeration and Air Conditioning Sector
4product variants Flux paste for silver brazing alloys “CuFe Nr. 1”
for brazing copper, copper alloys, steel and stainless steel
4product variants Copper brazing alloy “Cu-Rophos 2” CuP 279
for flux-free brazing of copper pipelines
4product variants Copper brazing alloy “Cu-Rophos 15” CuP 284
for flux-free brazing of copper pipelines
2product variants Silver brazing alloy Ag 145 “UM”-High
45 % silver brazing alloy (L-Ag45Sn) – flux coated
Soldering Methods in the Refrigeration and Air Conditioning Industry
Specialized silver and copper brazes are essential for extreme temperature and pressure fluctuations. They ensure durable, resilient joints and the highest level of safety in plant engineering.
Learn more about brazing and its applications in the refrigeration and HVAC industries!
Brazing
Silver and copper brazes used in KK technology must withstand the harsher operating conditions typical of this type of plant engineering. Sudden pressure fluctuations, temperature changes, and extremely low temperatures down to -196 °C may occur. Copper brazing alloys without silver cannot be recommended. The brazing alloys CuP 279 (Cu-Rophos®2) and CuP 281a (Cu-Rophos®5) are suitable for use down to -50 °C, CuP 284 (Cu-Rophos®15) and CuP 286 (Cu-Rophos®18) are suitable for use down to -70 °C. For lower temperatures, phosphorus-free silver brazes are used. Stainless steels should be brazed with the silver brazing alloy Ag 156. For all applications mentioned here, the fluxes FH 10Cu-Rosil® and Cu-Fe No. 1 can be used as needed.
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