Shandong Zentek Enrgy & Power Co.,ltd is one of the reliable factory and suppler for solar vacuum tube,heat pipe solar vacuum tube,heat pipe solar collector,solar water heater and parts for SWH over 12 years,we have the world class full range of automatic lines for solar thermal products from glass tube to solar water heater .

In year 2018,we have started the No.1 automatic lines for big size solar vacuum tube which can produce 125/137/150mm diameter,length from 600-2100mm.With this new line we can supply the 125*1800mm tubes over 200000pcs per year.

The big size solar vacuum tube is widely used in solar cooker,tank less solar collector and so on.

Right now,we have have exported our super quality big tubes to USA,Germany,Italy,India,Mexico,South Africa,Middle East and so on.Our target is to be the number one supplier in the world for the solar vacuum tube and we will do our best to leading the quality and service in the market.

1. What is your production capacity per year?

--Production capacity could reach 10 million pcs per year.

2. Do you produce the high borosilicate glass tubes all by yourself?

--Yes, we have 2 furnaces in our factory and over 20 coating lines. We could assure the stability of quality from the glass tubes to solar vacuum tubes.

3. How about the guarantee?

--Five years guarantee and 15 years' lifespan.

4. Is OEM available?

--Yes, we could help you design the logo and print logo on tubes and packages.

1. Patent Technology for sealing tube

2. The best broroslicate glass tubes in the world,no scratch,no stones,transmittance is 91%

3. 2.5 hours time for coating and evacuating

4.Stagnation temperature over 250 degree

5.5 years warranty,20 years lifespan

7.Uniform color

8.Fast delivery,10000pcs in 30 days