Name: All-Glass Double Vacuum Tubes (KG47)

All-glass double vacuum tubes, has excellent advantage of common glass vacuum tube and metal sealing-in vacuum tube. It's a new style all-glass evacuated solar collector tubes, which gives full play to feature of "vacuum tube gathers a hot tube ".

Product Features:
(1)fast start-up and response, it passes heat to water tank quickly. It can collect solar heat even in cloudy day.
(2)It obtains high solar heat.
(3)Hermetic seal in inner pipe. It can withstand high pressure. It can connect with system of tap water.
(4)Water doesn't run in inner of double vacuum hot tube.
(5)It stands against freeze weather.
(6)it keeps warm for 24 hours.
(7)Available size: 47mmX1500mm, 58mmX1800mm