Солнечная стеклянная трубка

Solar glass tube: 1.widely used for solar water heater; 2.ensure operation in cold weather; 3.15 years' warranty for tubes. Solar glasstubetechnology: Material Apply for high 3.3 borosilicate glass Models Φ47/58 Structure All-glass-coaxial double-layer tubes Outer tube diameter47±0.7mm /58±0.7mm Inner tube diameter37±0.7mm/47±0.7mm Tube thickness 1.6±0.15mm/2.0±0.15mm Absorptance 0.94 0.96 Emittance 0.04 0.06 Transmittance of outer tube0.91 Stagnation temperature(height) 270 300oC Presure-endure1Mpa Stable advanced coating up to 380. Starts up fast and collects solar energy fully. Unique super pure copper surface, allowing lower reflection and minimal heat loss. Can resist impact of hail:hailstone diameter 25mm. High level vacuum ensure operation under cold weather. Ideal heat collection efficiency in extreme cold water, with hot water available at a temperature of -30oC. Long time warranty for 15 years. The evacuated tube with superconductive heat-pipe is the most advanced product in the world. The current products mainly include:diameter:47/58mm;length:800/1200/1500/1600/1800/1900/2000/2100mm. And the most important thing is that we can also provide products as your request. Looking forward to having business with you in the near future!