all glass vacuum tube high quality and reasonable price easy install and long life time

all glass vacuum tubehigh quality and reasonable priceeasy install and long life time

Structure					All-glass double-tube co-axial structure
Glass material					High borosilicate 3.3 glass
External pipe diameter and thickness					Φ=47±0.7mm &=1.6mm  Φ=58±0.7mm &=1.6mmΦ=70±0.7mm &=2.0mm
Internal pipe diameter and thickness					Φ=37±0.7mm &=1.6mm  Φ=47±0.7mm &=1.6mm Φ=58±0.7mm &=2.0mm
Pipe length					800mm 1200mm 1500mm 1600mm                      1800mm 1900mm 2000mm 2100mm
Absorbing  coating property		structure			Cu/SS-ALN(H)/SS-ALN(L)/ALN
		sediment method			Single target magnertron sputtering plating
		Absorption ratio			a=0.90~0.93(AM1.5)
		Emmision ratio			ε=0.05~0.075(80±5)
Vacuum tightness					P≤5.0X10-3Pa
Average heat loss coefficient					ULT=0.6~0.7W/(m2.)
Hail resistance					Φ=25mm

2012 super three-target all glass vacuum tube