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Vacuum Tubes

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Vacuum Tube We supply high efficiency ETC tubes with 3 Targer coating and double glass of Co–axial Structure made of highborosilicate with different sizes, i.e., 47/1500 mm, 47/1800 mm & 58/2000 mm. This tubes have high vacuum & long term stability with warrenty. We also provide Manifolds, Rustring, Silicon Rings & Tube Holders.

Click here to view Technical Specifications of ETC Tube:

High Standard Vacuum Tube (outside black, inside coating silver)
Technical Parameters:

Sl. No. Description Specifications
1 Structure All–glass double–tube co–axial structure
2 Glass Material High borosilicate 3.3 glass
3 External pipe diameter and thickness Φ70 ± 0.7 mm = 2.0 mm
4 Internal pipe diameter and thickness Φ58 ± 0.7 mm = 2.0 mm
5 Pipe length 2000 mm
6 High vacuum, long-term stability 5 x 10 – 5Pa
7 Absorptive Coating Al–N / Al
8 Idle sunning property parameters 220 ~ 260 m2.oC / KW
9 Solar irradiation for obtaining a preset water temperature H ≤ 4.7 MJ/m2 (Φ58) H = 4.1 ~ 4 MJ/m2
10 Average heat loss coefficient 0.6 ~ 0.7 W/(m2.oC)
11 Absorption coefficient α than 93% (AM1.5)
12 Emission coefficient Σ ± 6%
13 Wind resistance 30 m/s
14 Freezing tolerance -35oC
15 Hail resistance 35 mm
16 Life aged More Than 15 years

 
   
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