solar water heater vacuum tube - 451500,581800

solar water heater vacuum tube, 1.vacuum tubes, 2.high efficiency, 3.good performance, 4.key part of the solar systems - more info check here: http://www.sourcingappliances.com/solar-water-heater-vacuum-tube-30099484/

Quick Brief

Type: Solar Water Heater Parts Place of Origin: Jiangsu China (Mainland) Brand Name: Longquan or OEM Model Number: 45*1500,58*1800 type of tubes: vacuum

Product Features:

solar water heater vacuum tube

1.vacuum tubes

2.high efficiency

3.good performance

4.key part of the solar systems

Business Terms:

Price Terms:FOB,CIF,EXW

Payment Terms: T/T,Western Union,MoneyGram,L/C

Minimum Order: Negotiatable

Delivery Port: Customized

Contact Supplier

Product Packagings & Delivery Terms:

Packaging Detail: carton

Delivery Detail: 10 days after the payment

Specifications and Product Details:

solar water heater vacuum tube

Model:47*1500 and 58*1800

Dimension	Φ47-1500	Φ58-1800
Material of Tube	3.3 High Boron Silicon	3.3 High Boron Silicon
Glass Expansion Ratio	(3.3±0.1)×10^-6K^-1	(3.3±0.1)×10^-6K^-1
Outer Diameter of Tube(mm)	47±0.1	58±0.1
Inner Diameter of Tube(mm)	37±0.1	47±0.1
Thickness of Glass	1.6±0.1	1.6±0.1
Transmittance	≥0.89	≥0.89
Length of Tube	1500±0.5%	1800±0.5%
Selective Coating	AL-N/AL or SS-CU- AL-N/AL	AL-N/AL or SS-CU- AL-N/AL
Absorptivity	≥0.86(AM1.5)	≥0.86(AM1.5)
Emissivity	≤0.080(80°C±5°C)	≤0.080(80°C±5°C)
Vacuum Degree	≤5.0×10^-3Pa	≤5.0×10^-3Pa
Collecting Performance Parameter under Sunshine	≥190m²°C/kw	≥190m²°C/kw
Hailstone Resistance	25mm	25mm