... and long life span.2. Advantages of JB flat plate solar collector(1)Blue titanium coating, with high absorptivity 93±2% and ... 50 years;(2)Special design structure, 360°heat transfer, excellent thermal conductivity;(3)Optical low iron tempered glass cover, light transmit ... , better than the normal 7/ 8 tubes, absorber plate surface thermal migration greatly reduced; Payments:1.30%T/T in advance ...