solar tube m series

Tube specifiactionStrucureAll-glass concetric dual tube geometrGlass materialBorosilicate glass Out tube dia meter and lengthφ=47 ±0.8mm =1500mm ±20mmφ=58 ±0.8mm =1800mm±20mm inner tube dia meter and lengthφ=37 ±0.8mm =1500mm ±20mmφ=47 ±0.8mm =1800mm ±20mmAI-N/Al Gtaded Al-N/Al solar selectuve absorbing coatingConstructionMothod to deposition DC reactive sputteringAbsorbing Coating propetitiesAbsorbance91%Emittance8%(80)(VACUUMP5×10-3 paStagnation parametter≥230M²/KWsolar radiance exposure for obtaining a preset water tempreture≤2.8MJ/M2Average heat loss coefficient≤0.8W/(M3)Lifetime15 15 years used for gtc-47 and gtc-58 solar water heater low pressure type. more of our products see on ww gtc-solar.com solar tube, solar tube, solar tube, solar tube,solar tube,solar tube, solar tube, solar tube, solar tube, solar tube, solar tube,solar tube,solar tube, solar tube, solar tube, solar tube, solar tube, solar tube,solar tube,solar tube, solar tube, solar tube, solar tube, solar tube, solar tube,solar tube,solar tube, solar tube, solar tube, solar tube,