Content :

Solar water heater manuafacturer with our own production factory for vacuum tubes, and production capacity of 5 million pieces of tubes annually. All our testing and inspection standard is higher than Chinese national standards.


Automatic production line for vacuum tubes, and control the production speed and quality.


1.   Three-target solar vacuum tube
- Key component of solar collector and solar water heater
- Coating material: Al-N/Al or SS-Al/N/Cu.


Specification






Absorbance rate after coating (AM1.5)




 %




89






Emission rate after coating (805 C)




 %




7






Stagnation parameter




m C/kW




251






Solar radiance exposure




 MJ/m




3.8






Average heat loss coefficient




W/(mC)




0.56






Selective coating material




 AL-N/AL, SS-AL-N/Cu






Impact resistance




Steel Ball Test: Steel ball with diameter
of 30 mm fall on the evacuated tube vertically from 450 mm height.






Vacuum degree




 Pa




3X10-3






Pressure




Mpa




0.6






Transparent (AM1.5)




0.86 (ISO9806-1: 1994)




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