RE K65COPPER TUBES
U.LCERTIFIED EXCLUSIVELYAT WALTERMORRIS
CO2ASAREFRIGERANT
CO₂ (R-744) refrigerant is termed a “natural” refrigerant because it exists in the natural environment Released from refrigeration systems into the atmosphere, CO₂ has a negligible effect to global warming and thus is not under any regulatory restrictions, as is the case for CFC, HCFC and HFC refrigerants.
In addition to its environmentalfriendly character, CO₂ is currently viewed as a viable solution for lowtemperature refrigeration applications because it is non-ozone depleting, non-toxic, non-flammable and has a high volumetric cooling capacity.
K65 addresses this challenge with a high-strength copper alloy specifically engineered for high-pressure CO₂ installations What sets K65 apart is that both the pipe and fittings are made from the same alloy, ensuring full material compatibility and consistent mechanical performance. This uniformity allows for traditional brazing techniques using standard tools, simplifying installation while maintaining a high level of safety and durability.
This uniformity allows for traditional brazing techniques using standard tools, simplifying installation while maintaining a high level of safety and durability.
K65 is also significantly lighter than steel alternatives, making it easier to handle and install, especially in tight or elevated spaces. Despite its lighter weight, it offers comparable strength and excellent resistance to pressure and corrosion With approvals for pressures up to 130 bar, K65 provides a robust and reliable solution for both transcritical and subcritical CO₂ systems.
As the industry shifts toward natural refrigerants, K65 offers a future-ready piping system that balances performance, safety, and efficiency helping contractors and engineers meet regulatory goals without compromising on quality or ease of installation.
Exclusively available through The Walter Morris Company, the K65 system offers contractors and engineers a highperformance option backed by deep technical support and supply reliability. As natural refrigerants continue to gain ground, having a trusted, engineered solution like K65 ensures your installations are not only compliant, but built to last
THEBENEFITSOFNATURAL REFRIGERANTS
1. ENVIRONMENTAL BENEFITS
Low Global Warming Potential (GWP): Natural refrigerants like CO₂ (R-744), ammonia (R-717), and hydrocarbons (like propane, R290) have very low or zero GWP, meaning they don't significantly contribute to climate change if released into the atmosphere. Zero Ozone Depletion Potential (ODP): Unlike older synthetic refrigerants (eg, CFCs and HCFCs), natural refrigerants do not deplete the ozone layer
2. REGULATORY COMPLIANCE
Phasing out harmful refrigerants: Governments and international agreements (like the Montreal Protocol and Kigali Amendment) are phasing out high-GWP synthetic refrigerants. Natural refrigerants help companies stay compliant with these laws.
3. ENERGY EFFICIENCY
Natural refrigerants often offer high thermodynamic efficiency, which can lead to lower energy use in cooling and refrigeration systems. This translates to reduced energy costs and carbon emissions over time.
4. LONG-TERM AVAILABILITY
Being naturally occurring substances, these refrigerants are not under patent restrictions and are widely available. This ensures price stability and long-term availability compared to synthetic alternatives that may be regulated or banned.
5. SAFETY AND SUITABILITY
While some natural refrigerants (e.g., ammonia is toxic, hydrocarbons are flammable) pose handling challenges, modern technology and strict safety standards make them viable and safe options in many industrial and commercial applications.
APPLICATIONS
GROCERYSTORE
Ideal for transcritical CO₂ systems used in cases and freezers. K65 handles high pressure, installs easily, and resists corrosion
FOODPROCESSINGPLANT
Used in production cooling and storage, CO₂ is clean and efficient. K65 meets hygiene needs and handles the constant pressure of industrial systems.
ICERINKS
CO₂ systems keep ice consistent and energy-efficient. K65 supports long pipe runs, high loads, and tough conditions while being lightweight and durable
DATACENTERS
CO₂ offers efficient cooling in compact spaces. K65's small diameter and high pressure rating make it ideal for modern, space-constrained systems.
COLDSTORAGEWAREHOUSE
These facilities use CO₂ for large-scale cooling. K65's strength and light weight make it a great fit for extensive piping networks in high-rack environments
HOSPITALS &LABS
Sensitive storage areas rely on safe, stable cooling. K65 is non-corrosive, pressureresistant, and dependable for mission-critical refrigeration.
