Solar Water Heater Tube
Material: vacuum tube solar collector
Eliminate the heat loss of the gas convection and conduction
Price Terms:FOB,CIF,EXW
Payment Terms: T/T,Western Union,MoneyGram,L/C
Minimum Order: Negotiatable
Delivery Port: Customized
Contact SupplierPackaging Detail: Packed with paper carton outside, foam is put between paper carton and tubes or as your request.
Delivery Detail: 15 days after conforming products
Solar Water Heater Tube uses vacuum tube solar collector to eliminate the heat loss of the gas convection and conduction, and the application of selective absorbing coating makes the radiation heat loss down to the minimum. It structures pressure well and can work in high temperature.
Glass Material: High borosilicate 3.3 glass
Structure: All-glass double-tube co-axial structure
External pipe diameter: D=47±0.7mm
D=58±0.7mm
Internal pipe diameter: D=37±0.7mm
D=47±0.7mm
Thickness of vacuum tube: 1.6mm / 1.8mm
Cover glass tube transmittancy: 0.91
Solar selective surface coating sputtering gradient: Al-N / Al
Solar absorption ratio(AM1.5): 0.93
Emission ratio(80°C): 0.06
Sun exposure temperature: ≥200°C
Anti-hail capability:No damage from D25mm hail impact
Coefficient of thermal expansion of glass: 3.3×10-6/°C
Heat loss coefficient: ≤0.90W( m2.°C) / ≤0.85W( m2.°C) / ≤0.80W( m2.°C)