both side open solar tube

we call it coil spiral solar tube or both side open solar spiral tube becasue they are made by coil and spiral which will bring longer life to the tubes .
Item: export to Germany evacuated glass tube
Company Strength : 10 years experence in solar tubes production ,with 10 production lines ,100 workers ,best quality control .
Partner : looking for partner of solar water tank factory from Turkey ,Jordan, Lebanon,Middle east , India, South East Asia Mexico, Brazil, South Africa ,Amercia ,Europe
Service :
1.OEM ( put your layser logo on tube .print logo on the carton )
2. arranging shipping for you . place the ship ,track the ship ,and inform the goods location. .Help you to clear import
3.Track the goods production for you .
4. check the best quality for you .
Package : 10/15/18/20/24pcs /box
Container loading Quanitity : 20
feet :4200
40HQ :6800
Minimum order : 100 pcs
Sea Port: Shanghai ,Ning bo
Payment : 30% T/T bank transfer before the production
70% T/T after the customer get the scan copy of Bill of lading to make sure that your goods is on the ship ( on the way to you )
Specification:
Strucure | All-glass double-layer coaxial | |
Tube material | High quality borosilicate glass 3.3 | |
Outer tube diameter and thickness | Φ=58±0.7mm & =1.6mm | |
Inter tube diameter and thickness | Φ=47±0.7mm & =1.6mm | |
Tube length | 1800mm | |
Absorptive coating | Structure | AL/ALN CU/SS/ALN |
Sediment method | Magnetron sputtering plating | |
Absorptance | a=0.88-0.92(AM1.5) | |
Emittance ratio | Σn:=0.04-0.08(80 ? ) | |
Vacuum quality | p ≤ 5.0 × 10-2 Pa | |
Stagnation parameter | Y=250-260M2. /kw | |
Solar irradiation under stagnation | Φ47 H≤3.7MJ/m2, Φ58≤4.7MJ/m2 | |
Average heat loss coefficient | ULT=0.78W(m2. ) | |
Lifetime | >15years | |
Hail resistance | Φ25mm/Φ40mm | |
Contact : If you need more information for the tube quality , price ,package photo , tube production , or other question , welcome to contact me as follow :
Tony Liao
(Sales Manager of Haining Chaoda Solar Collector Tubes Co ,Ltd)
Haining Chaoda Import and Export Co ,Ltd )
Telephone: 0086 0573 87859001
Cell phone :0086 13757348845
Email :tonyliao@chaodasolar.com
MSN: tonyliao1987@hotmail.com
Skype: tonyliao1987
Trade manager : cn205095001
QQ :937180438
Company address : #6,Chuangye Road ,Yuan Hua Town ,Hainning city ,Zhejiang province, China .












