all glass vacuum tube

1.all glass vacuum tube 2.Intercept efficiency: > 93% 3.Low heat reflection properties: < 0.86% 4.working pressure :0.6Mpa all glass vacuum tubeVacuum tubes consists of two glass tubes outer tube and inner tube Outer tube is made of extremely strong transparent borosilicate glass and adopted magnetism control Inner tube is made of borosilicate glass 3.3Absorptive coating property:AL/AL-ALN(H)/AL-ALN(L)/ALN Expansion Coefficient:3.3 x 10-6Hardness:7Excellent solar heat absorption Intercept efficiency: > 93% Low heat reflection properties: < 0.86% Main types of vacuum tube: 47 x 1,500, 58 x 1,800, 70 x 2,000 and 70 x 2,100mm Stagnation temperature: 180 to 190 degrees Celsius Heat insulating time: 72 to 80 hours Hail resistance: 25mm 

solar collector		Qty	Tank capacity	AbsorbArea	Measure	Total Weight	Loading quantity
							20'GP	40'GP	40'HQ
		(pcs)	(liters)	( m2 )	m3	(kg)	(sets)	(sets)	(sets)
Φ58-1800-15		1	150	2.1	0.75	80	34	72	90
Φ58-1800-20		1	200	2.8	0.95	146	27	60	75
Φ58-1800-30		1	300	4.2	1.3	161	20	43	54

all glass vacuum tube