Non-pressure without assistance tankNon-pressure without assistance tank Characteristics： This type uses all-glasses evacuated tubes as the solar collector for absorbing and transferring the sun energy into heat energy.The high absorption and low emittance rate of DIYI’ vacuum tube coating is unique.Depending on the different density between hot water and cold waterthe water flowing cycle is crated in the tube.Hot water flows automatically upwards while the cold water flows down.The water in the storage tank will be heated from this natural circulation. Technical Parameters: Inner tank: SUS 304-2B/0.41mmOuter tank: Galvanized steel/0.41mmSUS304-2B/0.41mmInsulation: high density polyurethane foam 50mmVacuum tube:47*1500mm/58*1800mmSS-CU-AIN/ALN or AL-N-AL coatingBracket:Galvanized steel 1.5mm/SUS 201 1.2mm20/25/38/45/50 degreeAccessories:UV stabilized high temperature siliconCapacity:100L 150L 200L 250L 300L（according to customers’ requirement）
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