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Evacuated Tube 58x2100mm

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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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