Excellent Pressurized Solar Heat Pipes 58 Evacuated Tube

evcuated tube
CCC, CE, ISO9001 Certificate

Features

1. It can withstand pressure of tap water when it works

2. Without incrusting, long usage life

3. One or several glass tubes broken will not fluence system work

4. Tubes can be laid for long time under the sun without water in the tank

5. No worry about being frozen because there is no water running inside the tubes when working

Specification

Structure: Two concentric borosilicate glass tubes

Material: Borosilicate glass 3.3

Outer tube diamete: Φ47/Φ58

Inner tube diameter: Φ37/Φ47

Length: 47-1500mm/1600mm/1800mm;

58-1500mm/1600mm/1800mm/2000mm/2100mm

Coating: single-target

Glass thickness: 1.6mm/1.8mm/2.0mm

Vacuum degree: P<5*10-3Pa

Thermal expansion: 3.3*10-6/°C

Insolation temperature: >200°C

Absorptance: >89%

Emittance: <12%

Heat loss: <0.8W(m2°C)

Maximum strength: 0.8Mpa

Resist cold: -35°C

Resist hail: 25mm/30mm/35mm

Resist wind: 30m/s

Start-up temperature: <=25°C

Lifetime: 15 years