Specifications:
1) inner manifold : stainless steel SUS304-2B
2) outer manifold: stainless steel
3) Glass tube dimensions: 47mm x 1.5m x 50 pcs
4) Heat preservation: 72hrs
5) Hail resistance: 25mm
a) Adopts the double-deck highly special hard glass tube of boron silicon
b) Double-deck glass coaxial structure, intermediate layer releases the vacuum, maintains 5 x 10-2Pa high vacuum for a long time while in charge
c) Magnetism accuse of alternative absorption coating, AL / N / AL of sputter aluminum nitrogen aluminum alternative absorption coating solar radiation absorption rate ? 93%, and hot emittance ? 6%
d) Long performance life: 15 years
e) Endures climate feature: thermal efficiency is good in the whole year



