solar water heater,Wholesale solar water heater China, Custom printed solar water heater

solar water heater Description

Features: 1) Inner tank: sus304-2B stainless steel, advanced welding technique, thickness 0.5mm2) Out shell: zinc and aluminum coated steel sheet or color steel sheet3) Corrosion resistant4) Isolation layer: 50-65mm imported polyurethane foam for superior heat preservation5) Frame materials: galvanized steel, electrostatic powder coated6) Type: 15, 18, 20, 24, 30 tubes7) Capacity: 130- 250 liter Technical data: Number of Tubes 10, 15, 20, 22, 25, 30 Length of Tube 1800 mm Outer Tube Diameter 58 mm Inner Tube Diameter 47 mm Glass Tube Thickness 1.6 mm Tube Thermal Expansion 3.3 X 10 -6 oC Tube Material Borosilicate Glass 3.3 Absorptive Coating Graded AI-N/AI Absorptance > 90% (AM 1.5) Emittance 7 % (100 oC) Vacuum P < 0.005 Pa Stagnation Temperature < 220 oC Heat Loss < 0.8 W/m2. oC) Reflector Ginning Alumnium reflector plate The out cover of the solar connector color steel or stainless steel. Frame Zinc coated steel corner sputtering frame Insulation Polyurethane Tested pressure 1.0MPa Working pressure 0.6MPa Daily efficiency >50%

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