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Direct Plug solar water heater High Performance With the cutting-edge vacuum-tube collecting technology, over 92% of sunshine energy is converted to thermal energy for heating. There is no circulation loss. High Reliability The system is simply working with the city water, with no pumps. The possible failures are eliminated to the least. Low Cost The lowest price of a solar water heating system, and payback as short as 5 years No Glycol, No Chemicals! Food grade water provided with the system, and no fire issues. No Maintenance No daily operations, no annual and periodical check-ups or maintenance is necessary. We set it, you forget it 1.Inner tank: 1).Materials:SUS304/2B,0.5mm(upper deviation),food grade stainless steel; 2).Welding procedure: completely auto argon arc welding; 3)Cover of inner tanks: curved outwards to bear higher pressure 2.Outer tank 1).Materials: a. Galvanized steel with double protection layers,0.41mm thickness; b. Stainless steel SUS304/2B,.041mm,food grade stainless steel 2)Production procedure: a. For galvanized steel outer shell, sheet are jointed-up after crimping; b.for stainless steel : completely auto argon arc welding(same as inner tank welding) 3) Outer cover 3.Insulation layer 1).Materials: CFC-free , environmentally friendly 2).procedure: Using CNC constant temperature, constant pressure quantitative foaming, curing processing, thick insulation layer, ensure the quality more close, well-balanced, insulation more abiding. 4.Brackets Materials: a. galvanized steel with corrosion resistant layer, thickness of 1.5mm b. stainless steel SUS201,thickness of 1.2mm 5.Evacuated tubes 1).Single target All-glass vacuum heat collection tube 2)Three target all glass vacuum heat collection tube 6.Packing:Export standard Cartons 7.Spare parts MODEL Lighting (m 2 )vacuum tubeCubage (L)GW (kg)Qty.per20'/40' ContainerdiameterlengthNo.SHDTS47/181.89Φ 47mm1500mm181006260/116SHDTS47/202.10Φ 47mm1500mm201116856/108SHDTS47/242.52Φ 47mm1500mm241337647/91SHDTS47/303.15Φ 47mm1500mm301668634/65 MODELLighting (m 2 ) vacuum tubeCubage (L)GW (kg)Qty.per20'/40' ContainerdiameterlengthNo.SHDTS58/18 2.59Φ 58mm1800mm181508441/79SHDTS58/20 2.88Φ 58mm1800mm201659037/71SHDTS58/24 3.46Φ 58mm1800mm2420011032/61SHDTS58/30 4.32Φ 58mm1800mm3025013025/48