Key Features:
The tube boasts a superior absorption rate, ensuring maximum utilization of solar energy.
It is constructed with a durable borosilicate glass, which is known for its thermal resistance and longevity.
The dimensions of the tube are designed to optimize heat collection, with an outer diameter of 58mm, an inner diameter of 47mm, and an overall length of 1800mm.
Technical Specifications:
The absorption rate is impressive, reaching ≥91%, while the emission rate is minimal at ≤7%.
The tube walls are robust, with both the inner and outer tubes having a thickness of 1.6mm.
The product is manufactured with strict quality control, limiting the presence of stones or knots and regulating the airline on the outer tube.
Product Characteristics
● Borosilicate glass 3.3
● High absorption rate
No. | Item | Characteristic/Nominal value/Tolerance/specifications |
1 | Glass material | High borosilicate glass 3.3 |
2 | Absorption rate | ≥91% |
3 | Emission rate | ≤7% |
4 | Outer diameter | φ 58mm±1,0 |
5 | Inner diameter | φ 47mm±1,0 |
6 | Length of the tube | 2100mm |
7 | Thickness of inner tube/outer tube | 1.6mm±1,5 |
8 | Quantity of stones/knots: bigger than 1mm/2.5mm | ≤0 |
9 | Quantity of stones/knots: within area of 10mm×10mm | ≤2 |
10 | Quantity of stones/knots: in sum per tube | ≤5 |
11 | Airline on the outer tube | Individual max. length≤100mm/Accumulative length per tube≤600mm |
12 | Scratch on the outer tube‘s outer surface | Individual max. length≤100mm/Accumulative length per tube≤600mm |
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