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Member Since
2009
Haining Meilu Solar Water Heater Co., Ltd.
vacuum tube
Length 1800mm
Outer tube diameter 58mm
Inner tube diameter 47mm
Glass thickness 1.6mm
Thermal expansion 3.3X10-6℃
Material borosilicate glass 3.3
Absorbing coating Graded Al-N-Al
Absorptance >92%
Emittance <8%
Vacuum P<5X10-3 Pa
Stagnation temperature >200℃
Heat loss 0.6~0.7W/(m2.℃)
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