high pressure solar collector

8. Hail resistance: 25mm

7. Heat preservation: 72hrs

6. Test pressure: 6 bar

5. Insulation layer: Polyuttethane foaming or rock wool

4. Vacuum tube coating material: AL-N-AL or ALN-SS-Cu

3. Tube dimensions: 58*1800mm/47*1500mm

2. Manifold (exterior)material: Aluminum alloy

1. Manifold (interior) material: Red copper