Product feature
1. The vacuum tubes transform solar light into heat energy and then transfer the heat to the working media depending upon the fin and U-shaped copper pipe in the manner of thermal conduction.
2. There is no water in the vacuum tube, so the tube will not broken in the winter.
3. It has a smaller thermal loss, stronger adaptability and better performance of aging-resistant membranous layer.
4. Can operate with water pressure up to 0.6MPa
5. Can be combined with existing energy source
6. Storage do not need be installed above the collector
7. It can be combined with the architecture perfectly
8. Solar Keymark certified solar collector

Product specification
Constitutes: vacuum tube, U pipe cooper, fins, heat transfer fluid, header, insulation layer
Solar Keymark certified U pipe solar collectors include:
HUJ-16/21,HUJ-12/21,HUJ-1 6/18,HUJ-12/18,HUJ-16/16,HUJ-12/16
Absorb area:1.522m21.142m2, 1.296m2, 0.972m2, 1.146m2, 0.860m2
Length of the tube: 1.6m,1.8m,2.1m
Numbers of the tube: 12pcs, 16pcs
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
Number of header pipes: 2
Outer diameter of the header pipe: 15mm
Inner diameter of the header pipe: 13mm
Material of the insulation in the header: Polyurethane
Thickness of the insulation in the header: average 20mm
Sealing material: Silicon ruber