non-pressurized solar water heater

NameDetailsOuter water tank:colorcoated steel or stainlesssteel with 0.35 to 0.5mm thicknessInner water tank:food grade SUS304/2B stainless steel with 0.5mm thicknessLayer for heat preservation:high density polyurethane of 50 to 60 mm thicknessAbsorb area:3.72mm square metersBracket:galvanized steel with 1.5mmthicknessType of vacuum tube:Borosilicate glass 3.3Material of coating:AL-N-AL/Cu-S/S-AL/N absorb coatingTube quantity:28Size of vacuum/evacuated tube:D58*L1800Capacity/volume (L):210Hail resistant:25mmAbsorb rate:93%thermal radiation rate:6% Features for solar water heaters:1, freeze-proofing, anti-scale, water purifier (optional);2, computer numerical control auto high-frequency electric impulse welding, have a long use life for its corrosion-proof.3,forceful consolidation of water tank and vacuum tubes, no water leakage.4,streamlined integration of bracket, more stable and durable.5,exquisite workmanship to guarantee the decent appearance.6, easy installation and it can be combined with the building or architecture perfectly.