Features:
Kaidun Highly-absorptive Vacuum Tube is made of borosilicate glass, which applies the advanced 12-layer of spattering deposition technology of gradual change of ALN/AIN-SS/CU selective absorptive coating. This makes the vacuum tubes highly absorptive and highly durable to high temperature and low temperature. Meanwhile the vacuum tube features a low reflection ratio. The interlayer gives the tube a unique effect of thermo, and the surface temperature could be as high as 380℃. It is the key part of the solar water heater and decides the performance of the heating system.
*Specification of Highly-absorptive Vacuum Tube
A) Structure: all glass concentric dual layer tube
B) Glass material: borosilicate
C) Absorptance: >0.92
D) Emittance: <0.08 (80℃)
E) Vacuum: <5*10-3 Pa
F) Stagnation: >230 ㎡.℃/KW
G) Average Heat Loss: <0.8 w/ ㎡.℃
H) Service life: more than 15 years
Technical Data of Highly-absorptive Vacuum Tube
|
Models
|
Material
|
Diameter
|
Length
|
Coating
|
Vacuum
|
Hail resistance
|
Transmittance
|
|
Ø47x1500
|
borosilicate
|
47 mm
|
1500 mm
|
ALN/AIN-SS/CU
|
≤5x10-3
|
Ø 25 mm
|
0.91
|
|
Ø47x1800
|
borosilicate
|
47 mm
|
1800 mm
|
ALN/AIN-SS/CU
|
≤5x10-3
|
Ø 25 mm
|
0.91
|
|
Ø58x1800
|
borosilicate
|
58 mm
|
1800 mm
|
ALN/AIN-SS/CU
|
≤5x10-3
|
Ø 25 mm
|
0.92
|
|
Ø58x2100
|
borosilicate
|
58 mm
|
2100 mm
|
ALN/AIN-SS/CU
|
≤5x10-3
|
Ø 25 mm
|
0.91
|
|
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