China Laminar Jet

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China Laminar Jet

Post  Louisiana Laminar on Mon May 05, 2014 1:32 pm

I've built several of my own laminar jets using all the great information from this site and I've had good and not so good results. However, I've decided to give the ones from China a shot since I can't seem to find the time to experiment with my homemade ones anymore. I searched around and found a manufacturer that has one with all stainless steel construction and also LED lighting. Including international shipping I managed to get two for $600. Almost half of that is shipping as the two jets were $370. They dismantle from the top for cleaning so I fully plan on taking it apart and see how they're constructed. I'll post pictures of the internals as well as the stream quality when I get them hooked up.
If they're good quality and have a good stream/lighting I'll be glad to email anyone the information on where I got them.

Not to sit anxiously and wait for the 4-6 weeks for international shipping!!

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Re: China Laminar Jet

Post  Therons on Wed Jun 18, 2014 9:30 pm

Any further update?

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Re: China Laminar Jet

Post  Ike on Wed Jun 18, 2014 10:06 pm

I would definitely love to see some good pictures of the internals to get some more design ideas

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Re: China Laminar Jet

Post  Louisiana Laminar on Fri Jun 20, 2014 10:41 am

The supplier took about 10 days or so to arrange shipping but it shipped out on a Monday and arrived at my house the following Friday which was impressive to me for international shipping. The supplier also replied to all my emails very quickly given the time difference which was nice since it was an internet/international purchase and there's always some risk with that. They are exactly as advertised. All stainless steel with LED installed and mounted on adjustable stand. They're pretty big around 10" diameter. LED lighting is very bright but I'm running them on my pool return line. My water clarity very good so it's carrying the light all the way to the pool and stream illumination is only average at best. One thing I'm a little disappointed in is the LED color change is automatic. No way to change pattern or hold one color. I wired both LED's together and they do hold the exact sequence and color changes. So while I have no control they're both changing at the same time and same colors. Stream is really very good and I'm going to try to attach a picture. I'm planning on taking one apart this weekend out of curiousity and also to see how much accumulation of crud is getting inside them. I'll take as many pictures as I can to help anyone out on design. In the picture (if it loads) the arc is around 6' high and around 12' out (the nozzles are placed inside pottery). The stream makes a little noise at entry and I'm still working on some issues with pump jitter since I'm running straight off of my pool pump. If I throttle the arc down to about 3' the entry point is perfectly silent but I can't walk under it around the pool.

Ok, I've tried several times to upload picture but can't figure it out. If someone can help me on how to load to this site from my iPhone I'd appreciate it!!

I also have a night video of lighted stream I'd like to load as well.

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Re: China Laminar Jet

Post  Ike on Fri Jun 20, 2014 1:10 pm

To host pictures, if you use the standard site instead of the mobile one there is a "Host an Image" button which is pretty easy. You upload a file and gives you a formatted link you can copy and paste in to your post.

Flickr and Photobucket both have free accounts and iPhone apps you can use. Once you upload a picture you can get a link to paste in a post or reply as well. Adding pictures to a post is usually easiest from the full forum site as the mobile one hides all the editing tools.

Looking forward to seeing your pics! I'm really curious to see the internals.

For your pump jitter problem you can try adding an air damper in the middle. All it is is a 3-4 foot high section of 4" PVC sitting up right that is sealed on both ends. You put the inlet at the very bottom and the outlet 6 to 12 inches above that. The big pocket of air at the top compresses and acts like a spring to dampen the pump jitter. The key is to make sure the cap at the top is sealed air tight so air can't get out. I use a standard PVC end cap on top and a toilet flange on the bottom to help it sit upright. It works surprisingly well and is pretty cheap to build.

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Re: China Laminar Jet

Post  Louisiana Laminar on Sat Jun 21, 2014 1:13 pm

Ok here goes, hope everyone interested can open the pics. The design is double wall like some of the other factory made models. Water enters the side of first tube and enters main tube at the bottom. Then it's just bottom screen, foam, and top screen. Really simple design. The top has about a 2" space between screen and outlet nozzle. The bottom supports hold the bottom screen about 1 1/4" off of the bottom. No spaces at all from top to bottom screen. Nozzle is same design as most of our homemade ones. A beveled stainless washer that's just welded in. Not sure why the nozzle has the additional tube that extends past the top cover plate a few inches??? Possibly to keep curious fingers from getting cut from the nozzle edge...???

Oh one other thing I noticed is the top screen does not have a cutout for the LED.

Ike, thanks for the tip for the filters to help out with pump jitter but I already read about that here and you can see my two 4'x4" filters mounted on the side of my house in a picture. I was most surprised with the lack of spaces in the whole unit. The double wall design also answers my curiosity as to why the diameter seemed rather large.

Any questions about them let me know.

Also, the pictures loaded from last to first so it may be easier to follow if you start at the bottom.




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Re: China Laminar Jet

Post  Ike on Tue Jun 24, 2014 4:50 pm

Thanks for all the pictures! Your setup looks great!

I'm still kind of curious how stacks of foam alone can make it laminar. I guess all the pores in the foam act like straws. Combine that with the giant 10 inch outer diameter and it still achieves a low Reynold's number.

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Re: China Laminar Jet

Post  antoine_N2B on Sun Dec 07, 2014 10:23 pm

Hi everybody,

Thanks for all the pictures it looks awesome for an industrial Laminar Flow Jet and Made in China !!

I searched on internet about them, but they all seem to be fake one :/ prices started from $150 to $15,000 and I'm quite sure to get trapped ...
If you would agree to link me your supplier's website, I would be delighted !

Thank you very much,

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Re: China Laminar Jet

Post  Louisiana Laminar on Tue Dec 30, 2014 6:24 am

Update on the China Laminar.

Unfortunatly the LED's didn't last. The tube they were in leaked and they quit working. However, I was able to purchase a waterproof landscape LED that fit inside the original tube and with the exception that's it's only one color it seems to be working pretty good. I'm also seeing some breaking down of the foam filters and I'll probably have to replace those in a few months. From what I've been reading on aquarium sites that use foam filtration this seems pretty normal depending on what the filters are made of.

The email address of the person who I purchased them from is salesa@flfountain.com and the company is Guanhzhou Fenlin Sauna Equipment Co. Her name is Grace Xie.

I have to assume the email address is still good since she sent one on 12/22/14.

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Re: China Laminar Jet

Post  antoine_N2B on Mon Jan 05, 2015 5:40 am

Thanks for your answer,

Can you please link us this waterproof landscape LED ?

I'll contact Grace Xie asap, I'm really curious to try their Laminar Jet !

With the details you gave us about the weakness you noticed, I'll try to improve the Laminar Jet as soon as I got it.
I'll keep you informed through this forum.

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