1) Working principle of low pressure solar heater: adopts the alternative

absorption coating to absorb the solar energy, heat the water in the

vacuum tube directly, through the cold hot water convection, changes the

solar energy into heat energy to store in the water tank:

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

Specifications:

1) Inner manifold : stainless steel SUS304-2B

2) Outer manifold:PVDF

3) Glass tube dimensions: 47mm x 1.5m x 25 pcs

4) Heat preservation: 72hrs

5) Hail resistance: 25mm