Changzhou Boshi New Energy Science & Technology Co., Ltd as manufactory producing Al N Al Vacuum tube Adopt the technique of magneticcontrol sputtering selective absorptive coatings improve the heat collecting efficiency, reduce reflectivity. The coating belongs to medial or low temperature layer. It is uniform, and especially used for compact solar energy water heater.
Select 3.3 high boron-silicon glass tube in according with GB/T2436-99(ISO4803-1978) standard. It has good performance of cold and heat resistance, high sunlight permeation, and strong optics stability.

Produce and inspect according to enterprise standard higher than GB/17049-1997 national standard.

Common specification: 47 1500mm; 58 1800mm; 70 2000mm
Complement shining amount ??3.8MJ/ m2 ??4.7MJ/ m2
Vacuum degree
Pressure resistance 0.6MPa 0.6MPa 0.6MPa
Heat impact resistance bear three pounds with 0 water
Assaulting resistance endure impact that 30mm steel ball fall down from 450mms
Shining temperature emptily >250
Absorptivity >92%
Reflectivity ??8% ??8% ??8%
Freeze resistance >-40
Weight(kg) ??1.3 ??2.0 ??3.1
Capacity(L) 1.3 2.7 4.6