separate pressurized solar water heater solar ener

Working principle: 1) When the discrepant temperature of the solar collector and water tank reaches the set value, thecontroller shall start the circulation pump automatically 2) The circulation pump makes heat-conducting liquid circulate automatically 3) The heat-conducting liquid transfers heat to water by heat exchanger in the water tank 4) In case the temperature of the water tank does not reach Tmax, then start the auxiliary heating device 5) If discrepant temperature of the collector and the water tank does not reach the setvalue, the circulation pump shall be shut automatically Feature: 1) Collector size: 130mm x 130mm 2) Vacuum tube: 1,500mm / 47, 12pcs/set, 24 tubes/set 3) Vacuum tube: 1,800mm / 58, 15pcs/set, 20pcs/set or 30pcs/set 4) Collector housing: 0.8mm stainless steel, frame 1.5mm stainless steel 5) Insulation material: polyurethane 6) Porcelain enamel inner tank, with copper coil inside, anti-freeze fluid do heat conversion to improve freezing-resistant, reduced scale, work normally under -30°C, super-big magnesium rod. Endures 21 bar pressure