Good quality reasonable price. Last price is depends on customers qty and reuqriements,3.3 high borosilicate glass tubes
1.Standard 3.3 high-boron-silicon glass-pipe 2.Low coefficient of heat loss 3.Good performance & price 4.15years warranty
1.High absorption and low emission; 2.good resistance to cold or hot environment; 3.fast water circalation and hot start. Structure | All-glass double-tube co-axial structure | Glass material | High borosilicate 3.3 glass | External pip diameter and thickness | Φ=47±1.0mm§=1.6mm±0.2mm Φ=58±1.0mm§=1.8mm±0.2mm Φ=70±1.5mm§=2.2mm±0.3mm | Internal pip diameter and thickness | Φ=37±0.8mm§=1.4mm±0.2mm Φ=47±1.0mm§=1.6mm±0.2mm Φ=58±1.0mm§=1.8mm±0.2mm | Pipe length | 950mm 1500mm 1600mm 1700mm 1800mm 1900mm 2000mm 2100mm | Absorptive coating property | Structure | Cu/SS-ALN(H)/SS-ALN(L)/ALN | Sediment method | 3 target magnetron sputtering plating | Specific absorption | As =0.93~0.96 (AM1.5) | Emission ratio | εh =0.04~0.06 (80±5) | Vacuum tightness | P≤5.0×10-3Pa | Idle sunning property parameters | Y=260~300 m2.C/KW | Solar irradiation for obtaining a preset water temperature | H≤4.7MJ/m2(Φ58) | H=3.7~4.2 MJ/m2 | H≤3.7MJ/m2(Φ47) | H=2.9~3.2 MJ/m2 | Average heat loss coefficient | ULT=0.4~0.6W/(m2.) |
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Temperature borosilicate glass tube with heavy wall thickness
