1, L=1800mm, D=58mm
2, CE, ISO, CCC
3, Water inside
4,Solar tube, vacuum tube, solar water heater tube
Price Terms:FOB,CIF,EXW
Payment Terms: T/T,Western Union,MoneyGram,L/C
Minimum Order: Negotiatable
Delivery Port: Customized
Contact SupplierPackaging Detail: Foam inside of the carton.
Delivery Detail: 15-20days
*Specification of Highly-absorptive Vacuum Tube Solar Water Heater
A) Structure: all glass concentric dual layer tube
B) Glass material: borosilicate
C) Absorptance: >0.92
D) Emittance: <0.08 (80)
E) Vacuum: <5*10-3 Pa
F) Stagnation: >230 ./KW
G) Average Heat Loss: <0.8 w/ .
H) Service life: more than 15 years