Evacuated Tube (70mm)

Features:

1. Heat-pipe conduction, no water inside, thus it is successfully prevented from the defects of tube block and low power output caused by water fouling and deposits of mud and sand.
2. It prevents the tube from being easily broken caused by the volume expansion when the water in tube freezes in frigid season.
3. Start up quickly. Energy inside the tube can be taken out within 2 minutes under sunshine. The stagnation temperature of the heat-pipe can reach 220
4. High efficient selective absorptive coatings and vacuum heat insulation technology ensure the tube to get higher heat output in cloudy weather and in moist area, especially in winter.
5. Solar collecting plate is installed and sealed inside the tube of high-quality borosilicate glass with 5x10-3Pa of vacuum, so it cannot be corroded event in moist area.
6. It perfectly solves the fetal defect of the common all-glass vacuum tube solar water heater, which cannot run if one of the tubes is out of work.

Speicifiations:

Model: WK-HP70

Length: 2000mm

Glass tube diameter: 70mm

Glass thickness: 2.0mm

Glass Material: Borosilicate Glass 3.3

Absorptive Coating: AL/N/AL

Absorber material: Aluminum

Condenser size: 14x75mm

Absorption coefficient: >92%  

Emission coefficient: <8%

Vacuum :<5x10^-3Pa

Wind resistance:30m/s

Freezing resistance: -50 celsius degree
Stagnation Temperature: >220 celsius degree

Net weight : 2.21kg