Item/Technical data

1500mm

 1800mm

Outer tube diameter

47mm

58mm

Inner tube diameter

37mm

47mm

Weight

1.40kg

2.15kg

Glass thickness

1.6mm

1.6mm

Material

Borosilicate Glass 3.3

Borosilicate Glass 3.3

Absorptive coating

AL/AL-ALN (Single target)

Cu/Ss-ALN (Triple target)

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