integrated pressurized solar water heater

Inner tank: SUS304-2B export stainless steel (argon arc welding and digital punch) Inner tank diameter and thickness:310/360/380mm(0.40mm/0.58mm) Outer tank: export the colour layer steel plate/PVDF Outer tank diameter and thickness:420/460/480mm(0.31mm) Insulation layer:50/55mm high density polyurethane foam Support material:1.5mm aluminum alloy Solar collector: three target tube (Φ58×1.8mm CU-stainless/C-coating) Seal ring:silicate rubber ring inlet,outlet:1/2' or 3/4' BSP male copper exchanger:35 meters long,12mm diameter, 1mm thickness Accessory(optional) 1. Assistant tank water supply control pressured,5L 2. Electrical heater:1.5KW with thermolator 3. Controller system:water leveltemperature sensor,digital control display Advantage: 1. It can be used in the extremely cold area, there is no water in the vacuum tube, and it can resist the 35 below zero, aslo it can't expoled. 2. It can improve the heat-collecting efficiency largely. 3. There needn't to clean the vacuum tubes, also no deposits. 4. The aluminnum alloy is light and handy. 5.The water tank can keep the water hot lasting for 72-80 hours. 5. The whole system can used for more than 10 years.