Solar Water Heater Vacuum Tube

• Pressure: Pressurized
• Interior Material: Copper
• Collector Components: Glass Vacuum Tube
• Certification: CE
• Size: 58X1800mm
• Transport Package: Carton Box+ Form
• Model NO.: 58x1800MM
• Trademark: SUN-SEEKER
• Origin: Haining
• HS Code: 8419191000
• Production Capacity: 10000PCS/Month

Product Description

Vacuum tube material:
1. Borosilicate glass 3.3, three layer (AL-N-AL) absorb coating for tube
2. Borosilicate glass 3.3, three layer Cu SS-ALN ( H ). SS - ALN (L )/ ALN absorb coating for tube
3. Model: We have Φ 47x1.5M, Φ 58x1.8M, Φ 70x2M

tube	standard tube(normal tube)		Tri-tube(Three high tube)
Specification	4715	5818	4715	5818
Length	1500mm	1800mm	1500mm	1800mm
Outer tube diameter	47mm	58mm	47mm	58mm
inner tube diameter	37mm	47mm	37mm	47mm
weight	1.3kg	2.2kg	1.3kg	2.2kg
Glass thickness(inner tube)	1.6mm	1.6mm	1.6mm	1.6mm
Glass thickness(outertube)	1.8mm	1.8mm	1.8mm	1.8mm
Glass material	Borosilicate Glass3.3	Borosilicate Glass3.3	Borosilicate Glass3.3	Borosilicate Glass3.3
Coating material	AI-N-AI	AI-N-AI	AIN-SS-Cu	AIN-SS-Cu
Coatin position	Outer surface of inner tube	Outer surface of inner tube	Outer surface of inner tube	Outer surface of inner tube
Deposition Method	DC reactive sputtering	DC reactive sputtering	DC reactive sputtering	DC reactive sputtering
Absorption ratio	≥ 91%	≥ 91%	≥ 94%	≥ 94%
Reflection ratio	≤ 7%	≤ 7%	≤ 6%	≤ 6%
Vacuum degree	3.0T2-3pa	3.0T2-3pa	8.0T2-3pa	8.0T2-3pa
Thermal expansion	3.3*10-6/	3.3*10-6/	3.3*10-6/	3.3*10-6/
Stagnation parameter	220m2/kw	220m2/kw	220m2/kw	220m2/kw
Sloar rediance exposure for obtaining a preset water temperature	4.6MJ/M2	4.4MJ/M2	3.9MJ/M2	3.6MJ/M2
Average heat loss coefficient	0.75w/(m2. )	0.73w/(m2. )	0.67w/(m2. )	0.62w/(m2. )
Max pressure	0.6Mpa	0.6Mpa	0.6Mpa	0.6Mpa
Minimum temperature   endurable	-35	-35	-40	-40
Hailstore endurable   (diameter)	Less than D25mm	Less than D25mm	Less than D25mm	Less than D25mm
Maximum temperature   endurable	270	270	300	300
Lifetime	15 years	15 years	15 years	15 years