High efficiency all-glass evacuated solar collector tubes 58/47mm

Common/high efficiency tubes
All-glass coaxial double-layer tubes
outer tube diameter: 58/47mm
inner tube diameter: 47/37mm
Our solar collector can start up fast and collects solar energy fully, there is no need to wait and the water is available immediately, high level vacuum ensure operation under cold weather, and the unique super copper surface allowing lower reflection and minimal heat loss, the current products mainly include: diameter: 47/58mm, and the length is 1800mm, but we can also provide products as your request. Long time warranty for 15 years.
We are looking forward to establish business relationship with you!
3.3 high borosilicate glass tube performance and usage introduction

High borosilicate glass is one kind has first -class level of hydrolysis resistance performance high-borosilicate glass, widely used in laboratory and chemical plants, in recent years in the solar
heating device on the application have developed rapidly.
Advantages
High borosilicate 3.3 glass product has known as chemical stability, high voltage, resistance to
thermal shock and excellent processing performance characteristics.
Quality
High borosilicate 3.3 glass production tube, capillary, bar the use of advanced production
technology production, high borosilicate 3.3 (DIN ISO3585) in the world recognized. The
production process of every step has strict quality control, and through ISO9001 quality authentication.
Three kind of solar collector:
1.Common :evacuated collector tubes.
2. High-efficiency: Three-target evacuated collector tubes: blue and black-golden
3. High-efficiency: Three-target evacuated collector tubes: purple-golden (purple and golden)
Solar evacuated collector tubes technical data:
Dimension
Φ47
Φ58
Material of tubes
3.3 high borosilicate
3.3 high borosilicate
Glass expansion ratio
3.3±0.1X10-6 k-1
3.3±0.1X10-6 k-1
Outer diameter of tubes
Φ47±0.7
Φ58±0.7
Inner diameter of tubes
Φ37±0.7
Φ47±0.7
Thickness of glass
1.6±0.15
1.6±0.15
Transmittance
≥0.89
≥0.89
Selective coating
SS-CU-AL-N/AL
SS-CU-AL-N/AL
Adsorptivity
≥0.86(AM1.5)
≥0.86(AM1.5)
Emissivity
≤0.080(80±5)
≤0.080(80±5)
Vacuum degree
≤5.0 X 10-3Pa
≤5.0 X 10-3Pa
Collecting performance under sunshine
≥190m2/kw
≥190m2/kw
Hailstone resistance
25mm
25mm
Start up fast and collect solar energy fully
Unique super pure copper surface,allowing reflection and minimal heat loss.
High level vacuum ensure operation under cold weather.
Long time warranty to 15 years