China    manufacturer

Changzhou Sunfield Solar Technology Co., Ltd

We are engaged in the research, development, manufacturing and marketing 

of solar water heaters, and solar collectors.

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Sunfield people are very kind. You are full of responsibility. The products are of good quality. Now, I do not get any feedback of the quality problem

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evacuated tubes for solar water heater collector

Product Details:

Place of Origin:Changzhou, China (mainland)
Brand Name:sunfield
Model Number:Vacuum tube (evacuated tube)

Payment & Shipping Terms:

Minimum Order Quantity:10 set
Packaging Details:carton with foam
Delivery Time:5 days
Payment Terms:TT, LC, Western Union
Detailed Product Description

Customized Solar Water Heater Accessories Vacuum Tube, Evacuated Glass Tubes

Solar Water Heater Accessory Vacuum tube (evacuated tube)            

 

      

                           

                         

Applications:

Vacuum tubes are used for solar water heaters and solar collectors.

 

Feature:

a.three target(AL/N-SS-CU)coating

b.High heat-collecting effciency

c.Good weather-resistance

 

Specifications:

Structure

All-glass concentric dual tube geometer

Glass material 

Borosilicate glass 

Outer tube diameter and thickness 

Φ=47±0.7mm & =1.5mm 
Φ=58±0.7mm & =2mm 
Φ=70±0.7mm & =2mm

Inter tube diameter and thickness 

Φ=37±0.7mm & =1.5mm 
Φ=47±0.7mm & =1.6mm 
Φ=58±0.7mm & =1.6mm

Tube Length

1200(±5mm)1500(±5mm)
1700-1800(±5mm)
2000(±5mm) 

Absorbing
coating
properties

Configulation

1200(±5mm)  1500(±5mm)
1700-1800(±5mm)
2000( ±5mm) 

Method to deposition

Graded A1-N/A1 solar selective absorbing coating

absorptance

as 0.88-0.93

Emittance

Σn:-.08-0.04

Vacuum 

p ≤ 2 × 10-3pa

Stagnation parameter

>250M2C/KW 

Solar radiation exposure for obtaining a preset water temperature 

<2.8MJ/M2

Average heat loss coefficient

<0.8W(M2C)

Lifetime

15years

 

 

 

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Contact Details
Changzhou Sunfield Solar Technology Co., Ltd

Tel:86-519-82526008

Fax:86-519-85858231

Contact Person: Ms. Wendy

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