solar water heater(non-pressurized)

1.1Outer tank diameter: 420mm(47-1.5m)/460mm(58-1.8m)/480mm(58-2.0m)

2.Outer tank material: PVDF/colorful plate steel

3.Inner tank diameter: 310mm(47-1.5m)/ 360(58-1.8m)mm

4.Inner tank material & thickness: stainless steel 304-2B & 0.4mm

5.Support stand: Galvanized steel/ Aluminum alloy

6.Insulation: 55mm (47-1.5m)/ 50mm(58-1.8m)/ 60mm (58-2.0m)polyurethane foam
7.Interval: 7cm (47-1.5m)/ 8cm (58-1.8m) / 9.5cm (58-2.0m)

8.No. of vaccum tubes: 15---36

Specification of tubes:

Structure:  All glass concentric dual tube structure

Glass material      : Borosilicate glass     

Outer tube diameter and thickness:   58±0.7mm/ 1.6mm     

Inner tube diameter and thickness:  47±0.7mm; 1.6mm

Length of tube:    1800(±5mm);     

Construction: Graded AL-N/AL selective absorbing coating

Heat-absorbing rate: >92%      

Emission of heat :< 8 %( 80)

Vacuum degree: P<5x10-3 Pa 

Solar radiance exposure: ≤2.8MJ/M2                                                             

Calories absorption: 9.1MJ/M2

Average heat loss: ≤8.6W/ (M3.K)

Pressure-endure ability: 1Mpa