Direct Flow Solar Vacuum Tube

DFC-70 Direct Flow Solar Vacuum Tube:
1.10year guarantee 2.MOQ: 5pcs(1carton) 3.TT or LC
DFC-70 Direct Flow Solar Vacuum Tu
Direct Flow Solar Vacuum Tube


DF 70-1800 Absorber tube

absorber material
Aluminium
thickness of aluminium absorber
0.65mm
width of aluminium absorber
62mm
surface treatment
SS-ALN/CU
absorptance
≥95%
emittance
≤6%
flow pattern
Serial
diameter absorber tubes (mm)
70mm
no. of absorber tubes
10
length of tube
1810mm
Transparent cover
2.0mm Borosilicate galss 3.3
glass thermal expansion (/°C)
3.3x10
-6
°C
vacuum (Pa)
10
-4
Pa

stagnation temperature (°C)
230°C
freezing resistance
>-50°C
hail resistance (diameter)
35mm
max. operating pressure (bar)
9bar
allowed heat transfer fluid
Water or Anti-freezing Liquid