Inner tube

Thermoplastic polymer

Reinforcement

Polyester braid of high tensile strength with high modulus

Cover

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

Applications

Connections of static instruments lines and oil return lines

Features

Light – Flexible – Compact – Vibration absorber

Pressure resistance

Maximum working pressure: 130 bar (1.885 psi). Safety factor 5:1

Temperature range

-45 °C to +130 °C (-49 °F to +266 °F)

DESCRIPTION

The new QUADRA DN4 HP (internal diameter 4mm), flexible thermoplastic capillary hose, in two colors orange and black, represent the most efficient and developed system for the connection of pressure gauges, pressure switches and pressure test points in modern CO₂ units. Transfer Oil advice the standardization of use of the QUADRA DN4 hose, choosing the orange color for the high pressure circuits and the black color for the low pressure circuits, so identifying in an unambiguous way the two parts of the circuit. This reduces the possibilities of misconnections of the two pressure lines of the machine during production and maintenance.
In contrast to the brazing or bending operations that are necessary for rigid copper tubing, installation and connection of QUADRA HP flexible hose does not need any particular specialization and so making the connecting operation within anyone’s ability.

PERMEABILITY

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.

UV RESISTANCE

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.