All Glass Evacuated Tubes

All glass evacuated tubes are the key component of solar collectors. The evacuatedtube is similar to a conventional Dewar flask and consists of two borosilicateglass tubes, a glass with high chemical and thermal shock resistance. The outerside of the inner tube is coated with a sputtered solar selective surface. Thiscoated inner tube is closed at one end and sealed at the other end to the outertube. The annular space between the outer tube and inner tube is evacuated to virtually eliminate heat loss by conduction and convection.Size:?7x1500?7x1800?8x1800?8x1900?8x2000?0x2000In cartons producing area:China payment:T/T in advance, L/C at sight supplying capacity:100000