Can FR5 air conditioning hose be safely used with CO2 (Râ744) systems given their much higher operating pressures?

FR5 air conditioning hose can be used with CO2 (Râ744) only if its specific diameter/version provides a working pressure rating adequate for CO2 systems. CO2 refrigeration operates at pressures roughly ten times higher than conventional refrigerants, so you must match the hoseâs working pressure (45â120 bar, depending on diameter) to the systemâs maximum pressure and applicable safety margin. Key points: - Check the exact FR5 hose diameter: smaller sizes may be rated at the higher end (closer to 120 bar), larger sizes at the lower end (â45 bar). - Verify the systemâs maximum operating and surge pressures (including warm-up, high ambient and test pressures). Ensure the hoseâs rated pressure exceeds those values with a suitable safety factor per standards/regulations. - Materials (PA/TPE inner, polyester braid reinforcement, polyurethane outer) are compatible with common refrigerants and POE/PAG oils; manufacturer notes indicate CO2 use is possible for 1/12"â1/4" sizes, but only when pressure ratings are adequate. - For charging/filling/testing applications versus permanent highâpressure lines, follow manufacturer guidance.some hoses are intended only for filling/testing in automotive A/C. - Always follow relevant codes, manufacturer recommendations, and perform pressure testing with appropriate fittings and safety procedures. Conclusion: FR5 may be safe for CO2 if the chosen diameter/version is rated sufficiently (e.g., near 120 bar) and installation follows all manufacturer and regulatory requirements; otherwise do not use it.

Is FR5 air conditioning hose compatible with POE and PAG compressor oils used in modern A/C systems?

Yes. FR5 air conditioning hose is compatible with POE and PAG compressor oils used in modern A/C systems. The hose description explicitly lists POE and PAG oils among compatible compressor oils and specifies materials (PA or PA/TPE inner layer, polyester braid reinforcement, polyurethane outer layer) and operating ranges (working pressure 45â120 bar, temperature â45Â°C to +130Â°C) suitable for automotive filling and testing with listed refrigerants.

Can FR5 air conditioning hose be used for high-pressure CO2 charging and leak testing procedures?

Yes. with important limits. FR5 air conditioning hose is specified for refrigerants including CO2 (Râ744) and lists working pressures from 45 to 120 bar depending on diameter. Because CO2 refrigeration operates at pressures roughly ten times those of conventional refrigerants, you must: - Verify the specific FR5 hose diameter and its rated working pressure. only sizes whose working pressure equals or exceeds the maximum charging/test pressure for your CO2 system are acceptable. - Use hoses with appropriate fittings and pressure ratings for CO2 to avoid weak points. - Respect the hose operating temperature range (â45 Â°C to +130 Â°C, note +70 Â°C limitation for water/air) and compatibility with POE/PAG oils if present. - Follow relevant standards and local safety regulations for highâpressure CO2 charging and leak testing; employ pressure relief, certified test equipment, and trained personnel. - Replace hoses showing wear, abrasion, or micro-perforation damage. In summary: FR5 air conditioning hose can be used for highâpressure CO2 charging and leak testing only if the chosen diameterâs working pressure rating (up to 120 bar) meets or exceeds your systemâs required pressures and all fittings, procedures and safety standards for CO2 are observed.

FR5 air conditioning hose

Additional information

Material	PA – polyamide
Maximum operating temperature [°C]	130
Minimum operating temperature [°C]	-45
Vacuum resistance	yes

Lightweight, flexible hose designed for industrial cooling systems (an alternative to copper tubes) and automotive air conditioning (only for filling and testing functions). Specifically for refrigerants (R22, R134a, R404a, R407c, R410a, R507) and compressor oils of the POE and PAG types. The hose in sizes from 1/12″ to 1/4″ can also be used for CO₂ (R-744) transmission – using CO₂ as a refrigerant requires pressures approximately 10 times higher than conventional refrigerants. Inner layer: polyamide (PA), for diameters from 1/12″ to 1/4″ a PA and TPE (thermoplastic elastomer) blend. Reinforcement: polyester braid. Outer layer: micro-perforated, abrasion-resistant polyurethane. Working pressure: from 45 bar to 120 bar, depending on hose diameter. Operating temperature: from -45°C to +130°C (for water and air up to +70°C).

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
ZC-FR5-02	FR5 thermoplastic hose (freon) 1/12" (max. 120 bar)	2	120
ZC-FR5-06	FR5 thermoplastic hose (freon) 1/4"	6	120
ZC-FR5-08	FR5 thermoplastic hose (freon) 5/16"	8	60
ZC-FR5-10	FR5 thermoplastic hose (freon) 3/8"	10	60
ZC-FR5-13	FR5 thermoplastic hose (freon) 1/2"	12	60
ZC-FR5-16	FR5 thermoplastic hose (freon) 5/8"	16	45

Lightweight, flexible hose designed for industrial cooling systems (an alternative to copper tubes) and automotive air conditioning (only for filling and testing functions). Specifically for refrigerants (R22, R134a, R404a, R407c, R410a, R507) and compressor oils of the POE and PAG types. The hose in sizes from 1/12″ to 1/4″ can also be used for CO₂ (R-744) transmission – using CO₂ as a refrigerant requires pressures approximately 10 times higher than conventional refrigerants. Inner layer: polyamide (PA), for diameters from 1/12″ to 1/4″ a PA and TPE (thermoplastic elastomer) blend. Reinforcement: polyester braid. Outer layer: micro-perforated, abrasion-resistant polyurethane. Working pressure: from 45 bar to 120 bar, depending on hose diameter. Operating temperature: from -45°C to +130°C (for water and air up to +70°C).