Evacuated Tube 58x2100mm

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