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We supply full sizes of solar vacuum tubes,our tube products are mainly include Single-target coated tube (AL/AL-ALN coating) and Triple-target coated tube (Cu/Ss- AL-ALN coating).All tubes are made of borosilicate 3.3 glass.

BAOGUANG heat collector vacuum tube technical data:

a) This collector tube adopts magnetron sputtering coating technology
b) Sediment absorption coating (CU/SS-AL-ALN) which makes it has high absorptivity and very low emissivity.
c) Specific absorption: α≥0.93~0.96 (AM1.5)
d) Emission ratio: ε≤ 0.06 (80+5°C)
e) Glass pressure of vacuum interlayer: p≤5 x 10-3Pa
f) Radiant exposure of close bask: H=3.7-4.2MJ/sq.m

g) Average heat waste coefficient: UIt≤.90W/ (sq.m°C)
h) It can resist impact of metal ball (25mm)and could perform very well in cold area in winter