Price: US $ 1.5 - 2 / Piece
Brand Name: ENSUN&OEM
Model Number: 58*18/47*15
Post Date: Jun 24,2012

Product Description: High Quality Normal Vacuum Tube

High Quanluity Normal Vacuum Tube

Product Description:

Consists of two glass tubes which are fused together at one end. The inner tube is coated with a selective surface that absorbs solar energy well but inhibits Radiative heat loss. The air is withdrawn ("evacuated") from the space between the two glass tubes to Form a vacuum, which eliminates conductive and convective heat loss. These tubes perform very well in overcast conditions as well as low temperatures. Because the tube is 100% glass, the problem with loss of vacuum due to a broken seal is greatly minimized. Glass-glass solar tubes may be used In a number of different ways, including direct flow or heat pipe configuration.
Technical data table:
Outer tube diameter:47mm/58mm
Inner tube diameter:37mm/47mm
Glass thickness:1.6mm
Thermal expansion:3.3x10-63.3x10-6
Material:Borosilicate Glass 3.3 Borosilicate Glass 3.3
Absorptive Coating: AL/N/AL AL/N/AL
Absorption coefficient: >92% >92%
Emission coefficient: <8% <8%
Vacuum: P<5x10-2Pa P<5x10-2Pa
Stagnation Temperature: >200>200
Net weight: 2.1kg




Supplier Details:

Haining Ensun Solar Technology Co., Ltd.

Sales:Mr. Ken Sun

Contact Phone:86-573-87788080

Main Products:Solar Water Heaters

Business type:Manufacturer, Trading Company, Agent


User Reviews: High Quality Normal Vacuum Tube