Item/Technical data

1500mm

1800mm

Outer tube diameter

47mm

58mm

Inner tube diameter

37mm

47mm

Weight

1.40kg

2.10kg

Glass thickness

1.6mm,1.8mm available

1.6mm, 1.8mm available

Material

Borosilicate Glass 3.3

Borosilicate Glass 3.3

Absorptive coating

AL/AL-ALN

Cu/Ss- AL-ALN

Vacuum degree

P<5X10 -3 Pa

P<5X10 -3 Pa

Thermal expansion

3.3X10 -6 /°C

3.3X10 -6 /°C

Insolation Temperature

>200°C

>200°C

Absorptance

α≥90%

α≥93%

Emittance

ε≤ 7.5%

ε≤6 %

Heat loss

<0.6-0.7W/(m²°C)

<0.4-0.6W/(m²°C)

Maximum strength

0.8Mpa

0.8Mpa

Resist cold

-35 °C

-35 °C

Resist hailstone

Ø 25mm

Ø 25mm

Resist wind

30m/s

30m/s

Start-up temperature

≤ 25°C

≤ 25°C