Vacuum tube
Feature
● Apply for two layers 3.3 high boron silicon glass tube.
● The two layers glass tube , with same axis is vacuum zed between them , the vacuum degree can reach
P ﹤5x10-2 Pa
● Coated with Al/N/Al selective absorbing coating material
● High absorbing sufficiency : the vacuum magnetic-control sputtering selective absorptive coating on the heat-collecting plates has a high absorption coefficient of more than 94%, and the emission coefficient around 6% .
● Long life :the life span can reach to 15 years .
● High practicability : able to endure impact of hail less than 25mm in diameter with high heat effeciency throughout the year .
Specification :
Length
1500mm
1800mm
Outer tube diameter
47mm
58mm
Inner tube diameter
37mm
47mm
Weight
1.3KG
2.2KG
Glass thickness
1.6mm
1.6mm
Material
Borosilicate glass 3.3
Borosilicate glass 3.3
Absorptive coating
Graded SS-ALNAL/Cu
Graded SS-ALNAL/Cu
Vacuum degree
P<5x10-2
P<5x10-2
Thermal expansion
3.3x10-6
3.3x10-6
Insulation temperature
>250 ℃
>250 ℃
Absorptance
>92%
>92%
Emissivity
<8%
<8%
Heat loss
<0.8W(m2℃)
<0.8W(m2℃)
Maximum pressure
0.8Mpa
0.8Mpa
Resist cold
-35℃
-35℃
Resist hailstone
Φ25mm
Φ25mm
Resist wind
30m/s
30m/s
Start up temperature
≤25 ℃
≤25 ℃
Effective collector area
0.05291 m2
0.25670 m2
Note:
No ● If you want to buy the samples , the quantity isn’t limited by the minimum order quantity above and can be decided by the actual need of the customers .
● We can make laser brand on tubes according to customers’ special request .
● The information above is the simple description of our products .If you are interested in our products , please contact us and we’ll send more detailed brochures of our products to you by e-mail .