Glass Vacuum Tube
$2.8
/piece
price excl.VAT
Negotiable
- Minimal order
- 100 pieces
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Product Specifications
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Product Description
Vacuum tube
Just like an automobile engine, the computer CPU, vacuum tube is the core component of the solar water heater. Its performance lies on the actual film coating technology. Sunbow Company adopted a new graded coating technology of Qinghua University, and tube raise the heat.
| Strucure | All-glass concentric dual tube geomer | |
| Glass material | Borosilicate glass | |
| Outer tube diameter and thickness | Φ =47±0.7mm & =1.5mm Φ =58±0.7mm & =2mm Φ =70±0.7mm & =2mm | |
| Inter tube diameter and thickness | Φ =37±0.7mm & =1.5mm Φ =47±0.7mm & =1.6mm Φ =58±0.7mm & =1.6mm | |
| Tube Length | 1200(±5mm)1500(±5mm) 1700-1800(±5mm) 2000(±5mm) | |
| Absorbing coating properties | Configulation | 1200(±5mm) 1500(±5mm) 1700-1800(±5mm) 2000( ±5mm) |
| Mothod to deposition | AL-N/A1 selective absorptive coating | |
| absorptance | as 0.88-0.93 | |
| Emittance | Σn:-.08-0.04 | |
| Vacuum | p ≤ 2 × 10-3 PA | |
| Stagnation parameter | 250M2C/KW | |
| Sloar rediance exposure for obtaining a preset water temperature | 2.8MJ/M 2 | |
| Average heat loss coefficient | 0.8W(M2C) | |
| Lifetime | 15years | |
Supply Ability
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Packaging and Shipping
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