QUADRA-dn6The QUADRA DN6 flexible thermoplastic hose is the latest QUADRA development in the world of flexible hoses for air conditioning and refrigeration systems. The QUADRA DN6 are characterized by an internal diameter of 6 mm, and therefore they can substitute copper rigid tubing of OD 8 mm or 5/16”.
The larger internal diameter reduces the pressure drop and makes the use of this hose possible on larger systems for the oil return lines and for the oil equalization systems. The crimping fittings for the QUADRA DN6 hose are available with connections of 1/4” SAE and 3/8” SAE and can be connected to the hose using the same hydraulic pliers RXA005 as used with the QUADRA DN4 hose. For large scale production it is now possible to use the new electric plier RXA010 which easily crimps the fittings for QUADRA DN2, DN4 e DN6 hoses.

Common technical data for DN2 – DN4 – DN6 hoses

Working pressure
Burst pressure
Working temperature
bar MPa psi bar MPa psi min°C max°C
120 12.0 1740 600 60 8700 -45° +130°

Performance and condition of use of DN6 hose – Conforms to UL requirements↑ to top

Internal Diameter
Outside Diameter
Bend radius
Hydraulic Plier Crimping Diameter
Electric Plier Crimping Diameter
Hose Color Part number Pack ID (mm) OD (mm) Bend Radius (mm) Hydraulic Plier Crimping Diameter (mm) Electric Plier Crimping Diameter (mm)


Hose coil


6 10,9 35

12,4 -0,1

12,4 +0,2

12,4 -0,1

12,4 +0,2





Hose coil




Permitted Fluids↑ to top

Type of Gas Type of Oil
HFO/HFC (R134a, R404A, R407A, R407B, R407C, R410A, R507, R32, R448A, R449A, R450A, R513A, R1234yf, R1234ze) polyol ester based
HCFC (R22) mineral oils
CO2 polyol ester based

Classification of QUADRA capillary hoses according to Directive 97/23/CE↑ to top

Part No Classification according to Directive 97/23/CE
0786C paragraph 3 article 3

Permeability ↑ to top

The specification EN 1736:2008, among other various aspects, regulates the requirements to qualify the permeability rate of non-metallic tubes used in air conditioning and refrigerating systems, including heat pumps.
The permeability value provides an indication of the maximum leakage tested at constant conditions of use.
Permeability is measured in grams, permeated from a square meter of the internal surface of the hose during one year (g/m2 per year). The real permeability value must therefore be measured considering the actual working time and temperatures to which the hose is subjected.


Inner tube

Thermoplastic polymer


Polyester braid of high tensile strength with high modulus


Thermoplastic polymer – orange or black – white ink-jet branding on black hose, black ink-jet printing on orange hose


Connection of pressure gauges, pressure switches and pressure test points


Light – Flexible – Compact – Vibration absorber

Temperature range↑ to top

-45 °C to +130 °C (-49 °F to +266 °F)

UV resistence

The test was made using a specific equipment called “Solar Box ERICHSEN mod. S1D (Xenon Lamp)”. The duration of the test has been 200 hours in total. The evaluation is based on the observation of the grey tones of the samples: the samples should not change their grey scale.
The evaluation is expressed on a scale from 1 to 5, where 1 is very bad and 5 is excellent. The orange sample achieved rating 4 (good). The black sample achieved rating 5 (excellent). Hence it follows that for all applications where the hoses are exposed to direct and frequent sunlight, black Quadra hoses are to be preferred.


Flexible thermoplastic capillary hose dedicated to the connection of pressure gauges, pressure switches and pressure test points in Air Conditioning and refrigeration systems. In contrast to the brazing or bending operations that are necessary for rigid copper tubing, installation and connection of QUADRA® flexible hose does not need any particular specialization and so making the connecting operation within anyone’s ability.