K65: the number one choice for high-pressure refrigeration applications

Developed in conjunction with Wieland, the global leader in copper alloy tube production, K65 was created in response to the increased demand for CO2 R-744 in commercial refrigeration applications, and in particular supermarkets.

With the markets phasing out high-GWP refrigerants, Conex Bänninger’s K65 braze system utilises quality materials to become the installers choice for high-pressure refrigeration applications (up to 130 bar). The product is much lighter, making it easier to cut and much quicker to transfer to site compared to steel alternatives. It is available in a wide range of fittings from 3/8” through to 2 5/8.

Standard copper pipe can’t withstand the required 130 bar. K65 bridges the gap by offering a lightweight, easy-to-braze (no welding required) copper-iron alloy that is specifically engineered for the rigours of high-pressure CO₂ systems.

CO2 has zero ODP (Ozone Depletion Potential) and a GWP (Global Warming Potential) of just one. K65 is readily identifiable and easy to distinguish from traditional copper due to its slightly magnetic property, the K65 and 130 bar markings.

The K65 system is engineered for high efficiency and low operating costs in high-pressure installations. Using a high-strength copper alloy enables the use of refrigerants with superior thermodynamic properties, resulting in reduced energy consumption and lower maintenance costs.

The K65 alloy’s exceptional thermal conductivity accelerates heat transfer, allowing faster temperature achievement with less energy input. Furthermore, the system’s resistance to pressures up to 130 bar permits the use of natural, more economical refrigerants like CO₂, while employing smaller pipe diameters that optimize refrigerant volume and lower investment costs.

When professionally installed K65 fittings are covered by a twenty-five-year guarantee.