... circulation in the tube which is made of toughened high borosilicate 3.3 glass balances the temperature and prevents tube from ... , long life span ( up to 15 years) Standard PYREX high borosilicate glass with coefficient of linear expansion 3.3×10-6 ...
... heater collector *Working Principle:This solar collector applies the dual borosilicate glass vacuum tube as the heat absorber, It has a ... Tube Solar Collector KD-SC-AG*Material: A) Vacuum tube: borosilicate glassB) Manifold: red copperC) Joint box: aluminum alloy/stainless steelD ...
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