solar collector(heat pipe collector)

Solar Keymark, EN 12975 standard Constitutes: vacuum tube , heat pipe cooper ,fins, heat transfer fluid, header, insulation layer Solar Keymark certified heat pipe solar collectors: HRJ12/1.8 Absorb area: 0.970m2 Length of the tube: 1.8m Numbers of the tube: 12pcs Maximum pressure: 1300 kPa Operating pressure: 600 kPa Material of the cover tube: Borosilicate glass Transmission of the cover tube: 90% Outer diameter of the cover tube: 58mm Thickness of the cover tube:1.8mm Distance from tube to tube: 88mm Heat transfer fluid: Water-glycol Material of the fins: Aluminium Thickness of the fins: 0.3mm Material of the header pipe: Copper Material of the insulation in the header: Polyurethane Thickness of the insulation in the header: average 20mm Sealing material: Silicon ruber