3/8 soft copper tubing AEROLINE® SPLIT R4 for solar thermal systems (closed loop) and air conditioning, with copper tubes, splitable for easier installations.
Integrated tube system: consisting of insulating material made of EPDM, 2 x 3/8 soft copper tubes according to ASTM B88 Type L/ACR (soft), polyolefine protective film, UV-resistant, sensor cable AWG 18 (2 x 1.00 mm2 ) UL 600 V.
Thermal protection: The thermal loss is equal to that of two individually-laid pipes complete with ¾ thick thermal insulation. The characteristic value of thermal conductivity at + 104 °F, K-Value = 0.27 BTU in./h ft2 °F, at + 75 °F, K-Value = 0.25 BTU in./h ft2 °F, at + 32 °F, K-Value = 0.23 BTU in./h ft2 °F. Cu ½ .
Insulating material: made of EPDM, light, flexible, closed-cell, synthetic rubber; PVC and CFC-free. Flammability and smoke density: Self-extinguishing according to ASTM D 635 and Class V0 according to UL-94. No embrittlement of copper and stainless steel tubes according to DIN 1988 Part 7; dimensions according to DIN 52 275-2. Long term thermal stability up to + 257 °F; short term up to + 347 °F (stagnation temperature of collectors). Characteristic value of thermal conductivity at + 104 °F (+ 40 °C), K-Value = 0.27 BTU in./h ft2 °F ( 40°C = 0.039 W/mK), at + 75 °F (+24°C), K-Value = 0.25 BTU in./h ft2 °F ( 24°C = 0.037 W/mK), at +32 °F (0 °C), K-Value = 0.23 BTU in./h ft2 °F ( 0°C = 0.034 W/mK). Very good ozone resistance, UV-resistant. The tubes are marked in order to avoid any confusion between flow/return.