Spare vacuum tube

Glass tube outer diameter 58 mm
Glass tube inner diameter 47 mm< br />Glass tube wall thickness 1.6 mm
Glass tube length 1800 mm
Vacuum tube surface 0.128m2
Selective absorber coating material AL -N/AL/SS/CU
Absorbency > 95%
Emission (80°C) < 0.04 %
Vacuum P<5*10-3
Stagnation temperature >250 °C

The copper Heat pipe insert can be ordered separately.

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Empty vacuum tube

Empty vacuum tubes play an important role in the efficiency of the collector as they prevent heat loss and minimize heat conduction. Empty vacuum tubes create a vacuum-like environment to retain solar energy, as heat transfer in a vacuum is significantly less than in air or other media.

Vacuum tube solar collectors are often used in heating systems, water heaters, bathtubs, swimming pools or other heat-intensive applications. The spare empty vacuum tubes allow the solar energy to be efficiently stored and continuously supplied even in sunny weather or during less active periods of the day.

This product - due to its fragility - can only be delivered in a unit package.

15 empty vacuum tubes 58 mm thick, 1800 mm long with selective coating, spare parts for solar collectors or for collector construction

Spare vacuum tube

Empty vacuum tube