Solar water heater vacuum tube

Baoguang solar water heater vacuum tube specifications

1)all glass hard borosilicate :3.3 
2)high efficient selective absorption coating: SS-C/CU &AL/N

3)size of vacuum tube:47*1500mm ,47*1800mm,58*1500mm,58*1800mm,70*2100mm

the concrete specification as follows:

Model:TT47/1500,TT47/1800, TT58/1500,TT58/2000 TT70/2100

Specification:

1)      Glass material: Borosillicate glass 3.3

2)      Glass thickness:1.6mm

3)      Absorption coefficient more than90%(92%)

4)      Aborbtive coating:SS-C/CU&A;/N

5)      Emission coefficient :less10%(8%)

6)      Vacuum:less than 5*10-2 Pa

7)      Stagnation temperature: mor than220 Celsius

8)      Hail resistance:25mm

9)      Freezing resistance:-35 Celsius