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Evacuated Tube 58x1800mm

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Three-target solar vacuum tube
- Key component of solar collector and solar water heater
- Coating material: Al-N/Al or SS-Al/N/Cu.



Product Characteristics

1.borosilicate glass 3.3

2.High absorption rate


Data Sheet

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

1800mm

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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