lizoneill4

Walk into a newly built or recently refurbished supermarket in Australia and there's a good chance the refrigeration system keeping your groceries cold is running on CO₂ (R744). Once considered a technology best suited to Europe's cooler climate, transcritical CO₂ refrigeration has rapidly become the preferred choice for major Australian supermarket chains. Driven by environmental targets, improved system efficiency and advances in refrigeration technology, CO₂ is no longer an emerging...

As transcritical CO₂ (R744) refrigeration systems become increasingly common across Australia, technicians are moving away from traditional Type K and Type L copper in favour of high-strength copper-iron alloys such as K65 (CuFe2P). While K65 looks and handles much like standard copper, it shouldn't be treated the same on the job site. Designed to withstand operating pressures of up to 130 bar, K65 requires the correct brazing techniques to ensure every joint maintains its strength and...

If you're designing, installing or servicing modern refrigeration systems, you've probably noticed more pressure ratings stamped directly onto fittings than ever before. Manufacturers now clearly specify the Safe Working Pressure (SWP) or Maximum Allowable Pressure (PS) on their products to ensure they're matched to the correct application. Historically, standard copper and brass fittings were suitable for traditional low-pressure refrigerants with little concern about pressure ratings....