All glass vacuum tube (full glass Al-N-Al vacuum tube)
Normal all-glass vacuum tube
• Product specialty:
Apply for two layers 3.3 high borosilicon glass tube
● The two layers glass tube, with same axis is vacuumed between them, the vacuum degree can reach 5×10-2Pa.
● Coated with AL/N/AL selective absorbing coating material
● High absorbing efficiency: the vacuum magnetic -control sputtering selective absorptive coatings on the heat-collecting plates has a high absorption coefficient of more than 93%, and the emission coefficient around 6%.
● Long life: the life span can reach 15 years.
● High practicability: able to endure impact of hail less than 25mm in diameter with high heat efficiency throughout the year.
• Technical data table:
|model type||Φ47x 1.5m||Φ58x 1.8m|
|Wall gap distance||0.7mm|
|selective absorbing coating||AL/N/AL||AL/N/AL|
|the highest temperature||250℃||–|
|anti-impact capability||≤Φ 25mm (hail)||–|