Evacuated tubes:
1) high quality
2)low price
3)high absorption
4)10 years warranty
Port: shanghai
Minimum Order Quantity: 5 Set/Sets
Supply Ability: 500,000 Piece/Pieces per Year
Payment Terms: L/C,T/T,Western Union
Contact SupplierPackaging Detail: export carton or plywood case
Delivery Detail: with 15 days
vacuum tube for solar water heater and solar collector:
Specification:
1)Inner tube/outer tube diameter:37/47mm,47mm/58mm
2)Length of tube:1500mm,1800mm,2000mm,2100mm
3)Material:high 3.3 borocilicate glass
4)Thickness of tube:1.6mm, 2,1mm
5)Selective absorbing coating:ALN/AL -SS/CU CoatingCoating
6)Expansion coefficient:3.3*10-6
7)Excellet solar absorption:.>93%
8)Low heat reflection properties:<0.86%
9)Heat preservation:72-80 hours
10)Hail resistance:25mm