Metal Glass Sealing DFC-70 Direct Flow Solar Vacuum Tube
DFC-70 Direct Flow Solar Vacuum Tube: 1.10year guarantee 2.MOQ: 5pcs(1carton) 3.TT or LC
China Hitek Solar Co., Ltd.
DFC-70 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) | 10-4Pa | |
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 | |
Metal Glass Sealing DFC-70 Direct Flow Solar Vacuum Tube
