Product DescriptionThe evacuated tubes consists of two concentric
glass tubes which are sealed in a semi-circular shape on one side
and are joined to one another on the other side. The space between
the tubes is evacuated and hermetically sealed (evacuated
insulation). To use solar energy, the internal glass tube is coated
with an environmentally friendly, highly selective layer on the
outside, thus turning it into an absorber. The selective coating is
protected in the evacuated space. The aluminum nitride sputter
coating used is characterized by an extremely low emission and a
high absorption rate.Product ProcessProduct ParametersTube
StructureAll-glass double deck co-axial structureGlass
material Borosilicate 3.3 glassOuter tube diameter and glass
thicknessΦ58+/-0.7mm; glass thickness 1.6+/-0.15mmInner tube
diameter and glass thickness Φ47+/-0.7mm; glass thickness
1.6+/-0.15mmTube Length1800mmAbsorber coating Coating
Material Cu/SS-AIN(H)/SS-AIN(L)Sediment methodThree targets
magnetron sputtering
platingAbsorptivity0.93~0.96Emittance≤6.0%(80ºC+/-5ºC)Vacuum
degreeP ≤5.0X10-3(Pa)Transmittance of glass tube T ≥0.89(AM1.5
ISO9806-1:1994Stagnation parameterY: 240~250 m2ºC/KWAverage heat
loss ULT≤0.6 W/(m2*ºC)Hail resistanceΦ25mmPressure endure0.6
MPARemarksCover glass tubeProtect the whole
tube.The space between the cover glass tube
and the inner glass tube is mechanically evacuated to create a
vacuum environmentInner glass tubeFilled with heat
transfer fluid (generally water) and directly plugged to the water
storage
tankSelective absorbing coatingAbsorbs
solar radiation and transfers to the fluid in
the inner tube.RetainerKeeps the inner tube fixed.GetterAbsorbs the
residual air in the space between the cover glass tube and
inner glass tube. Company ProfileSince its establishment in
2002, Shandong Longguang Tianxu Solar Energy Co., Ltd (hereinafter
referred to as "Tianxu") has always engaged itself in the R&D,
production, sales and service of high borosilicate glass tubes and
new energy products including solar water heaters, solar vacuum
tubes, solar heat collecting project, air source heat pump,
photovoltaic products, etc. Tianxu has 10 sets of electric
furnaces, 70 sets of solar vacuum tube production line and 3 sets
of solar water heater production lines. The annual output has
reached one million tons of high borosilicate glass, over
16 million solar vacuum tubes makes Tianxu the largest
manufacturing base of high borosilicate glass tubes and solar
vacuum tubes. In 2015, Tianxu established a joint venture
company with Beijing Tsinghua Solar Co., Ltd- the solar vacuum tube
technology initiator in the world. The newly established company
has the world's most advanced solar vacuum tube production
lines. Strategic PartnershipPackaging & ShippingOur products
have been widely exported to many countries, like Vietnam, India,
Mexico, Syria, Korea, Dubai, Etc. we are serving the top brands in
solar water heaters for each country. Our yearly export quantity is
600 containers. Certifications /* March 10,
2023 17:59:20 */!function(){function s(e,r){var
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