evacuated tube

1).External pipe diameter :47mm/58mm/70mm

Internal pipe diameter:37mm/47mm/58mm

2).Thickness:1.6mm/2.0mm

3).Length:1500mm/1600mm/1700mm/1800mm/1900mm/2000mm/2100mm

4).Material: high borosilicate 3.3 glass.

5).Pass The Quality Supervision and Inspection

2.Features

1).Highly efficient absorber ,daily average efficiency over 50%

2).Can be used all years round in the climate

3).Low heat loss

4).Stable coating plating technology

5).High heat resistanceand high cold resistance.