water heater vacuum tube

Vacuum Tube Feature: The outside surface of vacuum heat-gathering tube is smooth and stainless. The transition of the lower port of tube is smooth. The sealing is round and pointless. The pure-black reflecting rate of plating film is low. It looks showily and without the falling-off the film. The mirror is full and smooth, its color is sterling. Thus, it can be used continuously for more than 15 years  .                                                                                                                                      The the vacuum tubes assimilate the advanced 12 layers of spattering deposition of trivalent element technology, high borosilicate glass, gradual change of SS-C/CU selective complex absorptive coating, and these make vacuum tubes have high performance of absorptance and low reflection ratio, performing a strong heating ability.

1. Glass material: High borosilicate glass vacuum tube
2. Construction: SS-C/CU selective complex absorptive coating