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Home » Product List » Vacuum tubes » All-Glass Vacuum Tube (QR-AG)
Product Details
All-Glass Vacuum Tube (QR-AG)
| Model NO.: | QR-AG |
|---|---|
| Unit Price: | Negotiable |
| Shipment Terms: | FOB/CIF/CFR |
| Payment Terms: | L/C,T/T |
| Minimum Order: | 1 Sets |
| Price Valid Time: | From Nov 14,2011 To Nov 14,2012 |
| Trademark: | QIRUI/OEM |
| Origin: | China |
| Use: | Bathroom |
| Pressure: | Unpressurized |
| Circulation Type: | Direct / Open Loop (Activezh) |
| Certification: | CE |
| Application: | Water Heater |
| Type: | Evacuated Tube |
| Pipe Material: | Glass |
| Export Markets: | North America, South America, Southeast Asia, Africa |
Features;
Our All-glass Vacuum Tube is made of dual borosilicate glass tubes, the space between the two tubes is evacuated. The AL/N/AL selective coating on the outer wall of the inner tube absorbs sunshine and transforms it into heat which in turn heats the cold water in the inner tube. When the water in the tube is heated, its density will decrease and will go upward into the tank; Meanwhile the cold water in the tank will flow down into the tube due to its greater density. Thus, the circulation and heat-exchanging in the system is completed. The color of the inner tube is black-grey. This vacuum tube has a high heat-efficiency and low price. It is suitable in areas with winter temperature above below zero 20º C.
Standard: (1)Φ 47mm, Length 800mm/1200mm/1500mm/1600mm/1800mm/1900mm/2000mm/2100mm
(2))Φ 58mm, Length 800mm/1200mm/1500mm/1600mm/1800mm/1900mm/2000mm/2100mm
(3)))Φ 70mm, Length 800mm/1200mm/1500mm/1600mm/1800mm/1900mm/2000mm/2100mm
Technical specifications
| Item name | all-glass vacuum tube | |
| Structure | All-glass double-tube co-axial structure | |
| Glass material | High borosilicate 3.3 glass | |
| External pipe diameter and thickness | dia. =47± 0.7mm & =1.6mm dia. =58± 0.7mm & =1.6mm dia. =70± 0.7mm & =2.0mm | |
| Internal pipe diameter and thickness |
dia. =37± 0.7mm & = 1.6mm dia. =47± 0.7mm & = 1.6mm dia. =58± 0.7mm & = 1.6mm |
|
| Pipe length | 1200mm 1500mm 1600mm 1700 1800mm 1900mm 2000mm 2100mm | |
|
Absorptive coating property |
Structure | AL/AL-ALN(H)/AL-ALN(L)/ALN |
| Sediment method | Single target magnertron sputtering plating | |
| Specific absorption | a s =0.90~0.93(AM1.5) | |
| Emission ratio | 0.05~0.075( 80 º C ± 5 º C ) | |
| Vacuum tightness | P ≤ 5.0× 10-³ Pa | |
| Idle sunning property parameters | Y= 220 ~ 260m² º C /KW | |
|
Solar irradiation for obtaining a preset water temperature |
H ≤ 4.7 MJ/ m² (dia. 58) | H=4.1~4.4 MJ/ m² |
| H ≤ 3.7 MJ/ m² (dia. 47) | H=3.1~3.4 MJ/ m² | |
| Average heat loss coefficient | U lt =0.6~0.7W/( m² . º C) | |
| Service life | more than 15 years | |
