Low Pressure Solar Geysers with 300L

Basic Info.Model NO.ST30-180Max. Capacity>200LStructure Compact Type Pressure Unpressurized Interior Material Stainless Steel Collector ComponentsGlass Vacuum TubeComposition Tank Insulation CertificationCE, ISO9001, En12975, Solar KeymarkModel NoSt30-180Outer Tank MaterialPVDF, Which Is The Best Anti-Eorde MaterialInner Tank MaterialStainless Steel SUS304-2bInsulationHigh Density Polyurethane FoamFrameZinc SteelFrame Angle25degree, 38degree, 45degreeAssistant Tank5LElectric Heater1500WTrademarkSuntask or OEMTransport PackageStandard Carton Box, Wooden Box, Wooden PalletSpecification 300L OriginChinaHS Code8419191000Product DescriptionSuntask Compact Non Pressure Solar Water Heaters: ST model  Features:1. Super Anti-erode outer tank: Outer tank is made by PVDF. Best anti-erode material. Especially for the seaside area, such as East South Asia, etc.2. Feeding water automatic: With a special design, feeding water automatically, and ensure the outlet water as a stable temperature.Working Principle:Compact non-pressure solar water heater relies on the natural circulation of the water between solar tubes and the water tank. Thermosyphon systems work on the principle of heat rising. The water enters the bottom of the collector and rises to the tank as it warms. The advantage of this system is that solar heat is stored in a well-insulated tank, so hot water can be used at any time without the penalty of overnight losses. Moreover, the insulation of the tank can protect heat for 72 hours without heat loss.Specification: Storage TankInner TankSUS304-2B food grade stainless steelInner Tank Thickness0.4mmOuter TankPVDF 0.4mm which is good at anti corrosionInsulating LayerPolyurethance Foam 50mmVacuum TubeMaterial of the glass tubeBorosilicate glassAbsorptive CoatingGrade ALN/AIN-SS/CULength of Outer Tube1800mmLength of Inner Tube1755mmOuter Tube Diameter58mmInner Tube Diameter47mmGlass Thickness1.6mmDistance between two tubes 75mmThermal Expension3.3*10-6/ºCAbsorption coefficient 95± 1 %Thermal emsision coefficient5 ± 1 %VacuumP≤5.0*10-3 PaStagnation Temperature>200°CAverage heat loss