solar vacuum tube

Solar Vacuum Tube:
1)Size:47/58 * 1500/1800 mm
2)Single target ,Three target ,Tri-element
3)the rate of absorption is high
Haining, China Manufacturer of Solar Vacuum Tube
We are the professional manufacturer of solar vacuum tube from China. Solar vacuum tubes are widely used in solar water heaters. It is economical and high efficiency.

Technical Parameters of solar vacuum tube :

Length
1500mm
1800mm
Outer Tube Diameter
47mm
58mm
Inner Tube Diameter
37mm
47mm
Weight
1.3kg
2.2Kg
Glass thickness
1.6mm
1.6mm
Material
High Borosilicate glass 3.3
High Borosilicate glass 3.3
Absorptive coating
Graded Al/N/Al
Graded Al/N/Al
Vacuum Degree
P<5*10 -3 Pa
P<5*10 -3 Pa
Thermal Expansion
3.3*10 -6 /°C
3.3*10 -6 /°C
Insolation Temperature
>200°C
>200°C
Pipe Material
Red Copper
Red Copper
Absorptance
>93%
>93%
Emittance
<8%
<8%
Heat loss
<0.8W/(m2°C)
<0.8W/(m2°C)
Maximum Strength
0.8Mpa
0.8Mpa
Resist Hailstone
30m/s
30m/s
Resist cold
Ø 28mm
Ø 28mm
Resist wind
30m/s
30m/s
Start-up Temperature
<=25°C
<=25°C