Vacuum Tube Solar Collector (CE,ISO,CCC approved)

Vacuum solar collector
1.ISO9001:2000& CE& CCC
2.Anti-freezen& pressurized
3.Advanced argon welding technical
Vacuum solar collector
Solar vacuum tube with straight copper heat pipe
, there is anti-freeze liquid inside as medium transfering of heat. By the design the water never Come into vacuum tube immediately so the tube will never be broken in low temperature in winter. We use this type for separate pressurized system or integrative pressurized system.
High quality of tri-elements as rose copper, stainless steel and aluminium nitride planting layers, heat absorption rate can reach more than 93%, certify enough power for hot water request.
Specifications:
Glass tube dimensions: 58mm x 1.8m / 47mm x 1.5m
Tube Material: Borosilicate Glass 3.3
Tube Coating: Graded AI-N/AI
Thermal Expansion: 3.3 x 10-6 C
Absorptivity: >93% (AM 1.5)
Emissivity: <8% (80 C)
Vacuum: P <5 x 10-3 Pa
Stagnation Temperature: >428 F
Heat Loss: <0.7 W/(m2 C)
Maximum Strength: 1.0 MPa
Details:
1, Manifold : red copper
2, Manifold Casing: aluminum alloy
3, Heat preservation: 72hrs
4, Hail resistance: 25mm
5, Heat Pipe: anti-freezing > -35°C