>excellent quality and good price
>environmental friendly
>enjoy hot water in 24hours
>anti-freezing, low temp use
Price Terms:FOB,CIF,EXW
Payment Terms: T/T,Western Union,MoneyGram,L/C
Minimum Order: Negotiatable
Delivery Port: Customized
Contact SupplierPackaging Detail: standard export carton for FCL,plywood case for LCL.
Delivery Detail: 10 days after confirm.
We products diameter 47,58, meters in length is 1.5 m /1.8 m / 2.0 m,multiple graded AI-N/AI specifications selective coating the entire structure of the coaxial double glass vacuum tube solar collector, three-cavity, the three executives interference coating. We look forward to solar industry colleagues to inspect and guide negotiations, and create a glorious industries.
The thick-walled tube is heavier and thicker. Resisting the better withstand natural conditions,.the vacuum tube in the north so as to further enhance the anti-freezing cold in winter.
Specification:
Models | Classic vacuum tube | Triple vacuum tube | ||
Structure | All glass double tube co-axial structure | |||
Glass material | High borosilicate 3.3 glass | |||
Outer tube diameter and thickness | 47±0.7mm/58±0.7mm | |||
Inner tube diameter and thickness | 37±0.7mm/47±0.7mm | |||
Tubes length | 1500±4mm/1800±4mm | |||
Material of coating | AL/N/AL | Al N/Al N-SS/Cu | ||
Absorptance | 0.90~0.94 | 0.94~0.96 | ||
Vacuum | P≤2×10-3pa | P≤2×10-3pa | ||
Transmittance of Outer Tube | 0.93 | 0.93 | ||
Stagnation temperature (height) | 250~270°C | 270~300°C | ||
Heat-loss coefficient | ≤0.6w/ m2*°C) | ≤0.3w/ m2*°C) | ||
Bearing hailstone ability | hailstone diameter25mm | hailstone diameter25mm | ||
Pressure-endure ability | 1MPa | 1MPa |