1.can work for long time under -40~300 2. Heat transfer performance is better 3.ISO,CE,CCC....

Heat pipe vacuum tubes

Heat pipe vacuum tubes is the application to the solar industry of heat pipe, and is the key component of solar water heater, which has great significance to the efficiency and life span of solar water heaters.

Characteristic of heat pipe:

1.The only heat pipe can still at normal work for long time under -40°C~300°C.2. Heat transfer performance is better,heat loss is lower and heated water temperature is higher.3. Quality control in accordance with corporation standard which is established on the basis of internationalstandard4. The product is manufactured by 14 ordinary process, nine general control processes, and 5 key controls process.5. Having passed the quality system byISO90016.China spark program product .The kinds of heat pipe classified by in-service condition

Solar vacuum tubes specifications

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 &=1.6mm  Φ=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		800m m    1200mm  1500mm  1600mm  1800mm  1900mm  2000mm  2100mm
Absorber Material		Aluminum,copper,stainless steel
Absorptive Coating		SS-CU-AL-N/AL
Absorption Coefficient		α≥0.92
Emittance		<8% (80°C)
Heat Loss		<0.8W/ ( m2°C )
Vacuum tightness		P≤5.0X10-3Pa
Maximum Strength		0.8MPa
Idle sunning property parameters		Y=260~300m2.°C/KW
Solar irradiation for obtaining a preset water temperature	H≤4.7MJ/m2(Φ58)	H=3.7~4.2MJ/m2
	H≤3.7MJ/m2(Φ47)	H=2.9~3.2MJ/m2
Single Tube weight (58/1800MM)		2.2kg
Wind Resistance		30m/s
Freezing Tolerance		-30 °C
Hail Resistance		¢= 30mm hail
Insolation Temperature		250 °C
Average heat loss coefficient		ULT=0.4~0.6W/(m2.°C)
Life Time (years)		15 years

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certification:

Heat Pipe vacuum tubes for type 70mm. wacuum tube for solar water heater