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The solar vacuum tube is made from borosilicate glass 3.3 and the structure of solar vacuum tubes is as same as the gallbladder of the pot, which is sealed with double glass and the double glass tube is pumped into a high-vacuum. The surface of inner glass is sprayed with selective coating through a special technology. The solar energy absorption rate can reach 94.5% by the usage of the selective coating, while the rate of thermal radiation below 5.5%. Vacuum tube absorbs solar energy, and then heats the water or liquid by heat conduction. The heat loss of liquid is very low through the high-vacuum between inner glass tubes and outside, its stagnation temperature is above 200 degrees. It is widely used in solar water heater, solar collector, and solar projects.
Established in 1991 , Changzhou Longquan Solar Energy Manufacture Co., Ltd. has made a name for itself in the list of top suppliers of Water Heater in China. The supplier company is located in Changzhou, Jiangsu and is one of the leading sellers of listed products.Changzhou Longquan Solar Energy Manufacture Co., Ltd. is listed in Trade India's list of verified sellers offering supreme quality of Solar Geyser, Vacuum Tube Solar Heater, Compact Non-Pressurized Solar Water Heater etc. Buy Water Heater in bulk from us for the best quality products and service.