China low price All-glass vacuum solar collector tubing

outer tube diameter: 58/47mm inner tube diameter: 47/37mm length: 1.5-1.8m absorptance:0.94~0.96 emittance:0.04~0.06

Our

solar collector tubes can start up fast and collects solar energy fully, high level vacuum ensure operation under very 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!

1. Glass material: high borosilicate glass 3.3

2. Common specification: diameter: 58(47)mm length: 1800mm

3. Type: common: color: deep blue

         Efficient: color: deep blue/ purple gold

4. Packing: 10pcs each carton

5. Technical parameters: the national standard of China

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

China low price All-glass vacuum solar collector tubing