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All-glass vacuum tube
Normal vacuum tube (SE-N)
 
   
ZJTEX Vacuum tube

Just like an automobile engine,the computer CPU,vacuum tube is the core component of the solar water heater. Its performance lies on the actual film coating technology. ZJTEX Company adopted a new graded coating technology of Qinghua University,and tube raise the heat.
 
Strucure
All-glass concentric dual tube geomer
Glass material
Borosilicate glass
Outer tube diameter and thickness
Φ=47±0.7mm & =1.5mm
Φ=58±0.7mm & =2mm
Φ=70±0.7mm & =2mm
Inter tube diameter and thickness
Φ=37±0.7mm & =1.5mm
Φ=47±0.7mm & =1.6mm
Φ=58±0.7mm & =1.6mm
Tube Length
1200(±5mm)1500(±5mm)
1700-1800(±5mm)
2000(±5mm)
Absorbing
coating
properties
Configulation
1200(±5mm) 　1500(±5mm)
1700-1800(±5mm)
2000( ±5mm)
Mothod to deposition
AL-N/A1 selective absorptive coating
absorptance
as 0.88-0.93
Emittance
Σn:-.08-0.04
Vacuum
p ≤ 2 × 10-3 PA
Stagnation parameter
＞250M2C/KW
Sloar rediance exposure for obtaining a preset water temperature
＜2.8MJ/M2
Average heat loss coefficient
＜0.8W(M2C)
Lifetime
15years
 
 
 
All-glass vacuum tube
Three-target tube (SE-T)
 
   
ZJTEX Vacuum tube

Just like an automobile engine,the computer CPU,vacuum tube is the core component of the solar water heater. Its performance lies on the actual film coating technology. ZJTEX Company adopted a new graded coating technology of Qinghua University,and tube raise the heat.
 
Strucure
All-glass concentric dual tube geomer
Glass material
Borosilicate glass
Outer tube diameter and thickness
Φ=47±0.7mm & =1.5mm
Φ=58±0.7mm & =2mm
Φ=70±0.7mm & =2mm
Inter tube diameter and thickness
Φ=37±0.7mm & =1.5mm
Φ=47±0.7mm & =1.6mm
Φ=58±0.7mm & =1.6mm
Tube Length
1200(±5mm)1500(±5mm)
1700-1800(±5mm)
2000(±5mm)
Absorbing
coating
properties
Configulation
1200(±5mm) 　1500(±5mm)
1700-1800(±5mm)
2000( ±5mm)
Mothod to deposition
AL-N/A1 selective absorptive coating
absorptance
as 0.88-0.93
Emittance
Σn:-.08-0.04
Vacuum
p ≤ 2 × 10-3 PA
Stagnation parameter
＞250M2C/KW
Sloar rediance exposure for obtaining a preset water temperature
＜2.8MJ/M2
Average heat loss coefficient
＜0.8W(M2C)
Lifetime
15years
 
 
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