all-glass vacuum tube
1.excellent quality
2.absorbs heat quickly
3.reduce emission ratio and improve heat efficiency
Port: shanghai/ningbo
Minimum Order Quantity: 1000 Piece/Pieces
Supply Ability: 10000 Piece/Pieces per Day
Payment Terms: L/C,T/T
Contact SupplierPackaging Detail: carton with foam
Delivery Detail: 7days
all-glass vacuum tube
Structure | All glass double tube co-axial structure | ||
Glass material | High borosilicate 3.3 glass | ||
Outer tube diameter and thickness | Φ=47±0.7mm&=1.6mm Φ=58±0.7mm&=1.6mm Φ=70±0.7mm&=2.0mm | ||
Inner tube diameter and thickness | Φ=37±0.7mm&=1.6mm Φ=47±0.7mm&=1.6mm Φ=58±0.7mm&=1.6mm | ||
Tubes length | 800mm 1200mm 1500mm 1600mm 1800mm 1900mm 2000mm 2100mm | ||
Absorptive coating property | Material of coating | CU/SS-ALN(H)/SS-ALN(L)/ALN | |
Sediment methods | 3 target magnetron sputtering plating | ||
Absorptance | As=0.92~0.96(AM1.5) | ||
Emission ratio | ∑h=0.04~0.06(80°c±5°c) | ||
Vacuum | P≤5.0*10-3(Pa) | ||
Idle sunning property parameters | Y=260~300m2.C/KW | ||
Solar irradiation for obtaining a preset water temperature | H≤4.7MJ/m2(Φ58) | H=3.7~4.2MJ/m2 | |
H≤3.7MJ/m2(Φ47) | H=2.9~3.2MJ/m2 | ||
Average heat loss coefficient | -U(LT)=0.4~0.6W/(m2.°c) |