1)No water in evecuated collector tubes
2)Evacuated collector tube with heat pipe
3)Much more efficient heating absorption

Split pressure solar water heater system includes major three parts, hose features as follows:

Part one: Soar collector tubes
1)Evacuated glass tube: Hard borosilicate: 3.3
2)Evacuated glass tube: High efficient selective absorption coating:
Tri-elements: SS-C/CU and AL-N/AL
3)Heat pipe: Oxygen free copper: Top: ø 14*1mm, body: ø 8mm *0.6mm
4)Alliminum alloy fin around heat pipe
5)Material of manifold pipe: TP2 copper
6)Material of manifold casing: TP2 copper: ø 35mm *0.8mm
7)Material of insulation in manifold casing: Rock wool
8)Thickness of insulation: (MM) 45MM
9)Density of insulation(kg/m3): 180-200kgs
10)Material of frame or support: Alliminum alloy: 2mm

Part two: Split pressurized storage water tank

1)Capacity: 200Liters

2)The material of inner tank: Food level stainless steel: 304-2B: Thickness, 1.2mm

3)The mateial of outer tank: Color painted iron plate: 0.40mm
4)The material of insulation: Polyurethane foaming: Thickness: 50mm
5)Working pressure: 0.6mpa
6)Auxilary electrical heater: 1.5KW
7)Size of inlet and outlet: 1/2"
8)The material of heating exchange: Copper material: Size of diameter: 12mm*imm length: 15meter *2mm

Part three:
Work station: Circulation pump, computerized systematic controller and peressure expansion and so on.

The principle of split pressure solar heating system being describing as follows:

The sunny rays shines on the solar collector tubes. The heat is absorbed by the selective absorption coating of glass tube. And the heat is transfered by alluminum fin, and transfered to heat pipe, then by the medium within heat pipe to co axial manifold copper pipe, then to heat exchange in water tank, finally to heat water around water storage tank.