Evacuated Tube Solar Collector

Evacuated Tube Solar Collector 1,vacuum tube length:47/1500mm,58/1800 2,vacuum tubes:15pcs,18pcs,20pcs,24pcs,30pcs 3,Outer tank material:202stainless steel with 0.31mm 4,Inner tank material:SUS304-2Bstainless steel thickness :0.41mm or 0.31mm 5,Insulation:foaming polyurethane thickness:50mm or 55mm 6,Optional electric heater:220v-240v 1500w/3000w 7,frame material :202 stainless steel 8,we could product for customer'special need It has 15years long life span ,and the vacuum tubes can work individually, so if the only one of them can't work,it won't influence on the others. The spare parts can be changed freely .it is suitable for the many resident buildings. Working principle: 1,The high quality vacuum tubes ansorb the solar ultraviolet ray;then heat the cold water in the vacuum tube 2,The hot water rise in the top of the water tank ,and the cold water sink to bottom,then heat by solar collector.so the whole system is always circulating continuously. 3,The electromagnetism or ball valve can perform the water supply automatically,the water in the tank is not sufficient ,the electromagnetism valve will open its valve, the tap water flow in the tank ,if the water is full,it will close the valve automatically