Best Check valves to use... - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 02-14-2013, 01:05 AM Thread Starter
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Best Check valves to use...

Hello folks,



In the picture you can see my current setup. The bubble counters started with 3/4 full of mineral oil about 4 days ago. Now, the only reason why they are half full is because the oil is passing through the check valve and staying in the tubing. The oil will never make it to the regulator as the tubing had a loop.

But, does anyone have this problem? What's the best check valve

Thanks!
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post #2 of 12 (permalink) Old 02-14-2013, 01:15 AM
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Swagelok makes some good check valves, but they are definitely on the pricier side compared to the plastic check valves.

There are some decent brass ones out there too, but you have to buy good ones; I had a few brass ones fail on me too.

Anthony


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post #3 of 12 (permalink) Old 02-14-2013, 01:51 AM Thread Starter
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Best Check valves to use...

Thanks Anthony, I'm trying to see which swagelok you are referring to. There are several choices...any links to the one you mentioned?

Thanks!
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post #4 of 12 (permalink) Old 02-14-2013, 02:54 AM
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Quote:
Originally Posted by Mathman View Post
Thanks Anthony, I'm trying to see which swagelok you are referring to. There are several choices...any links to the one you mentioned?

Thanks!
Here you are:

https://www.plantedtank.net/forums/sh...ok+check+valve

https://www.plantedtank.net/forums/sh...ok+check+valve

Anthony


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post #5 of 12 (permalink) Old 02-14-2013, 03:07 AM Thread Starter
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Best Check valves to use...

As always...thank you!
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post #6 of 12 (permalink) Old 02-14-2013, 03:39 PM
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us plastics makes some good check valves a gentleman on the forum has used with good success. i think they were .67 cents a piece and had them for a few years before replacement was neccessary

EDIT: ah and here they are
http://www.usplastic.com/catalog/ite...=searchresults

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post #7 of 12 (permalink) Old 02-17-2013, 07:21 PM Thread Starter
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Best Check valves to use...

Thanks buddy! Ill give these a try before attempting a brass inline valve.
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post #8 of 12 (permalink) Old 02-17-2013, 07:39 PM
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Best Check valves to use...

I have been using a stainless check valve from Beswick Engineering for about ten years now with no problems.


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post #9 of 12 (permalink) Old 02-18-2013, 01:35 AM Thread Starter
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Best Check valves to use...

Quote:
Originally Posted by Fishmommy View Post
I have been using a stainless check valve from Beswick Engineering for about ten years now with no problems.


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Any pics or link to the actual check valve you have? Is it inline? Thanks.
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post #10 of 12 (permalink) Old 02-18-2013, 01:48 AM
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Best Check valves to use...

http://catalog.beswick.com/#WORKFLOW...,FILTER_VALVES
I have one with 1/8 barbs on each end for my CO2 line


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post #11 of 12 (permalink) Old 02-18-2013, 11:30 AM
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All the ideas on check valves are good, but you can totally prevent the problem by looping the tubing going into the bottom of the bubble counters back up to the top of the bubble counter and then back down. This forms a "trap" so the oil can't flow down into the check valve.
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post #12 of 12 (permalink) Old 02-18-2013, 11:38 AM
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I bought a glass one for $15. The bulb inside moves and seats inside to avoid water flowing back. Yesterday I noticed a water/co2 bubble so it freaked me out. No water went into system though.

Because the glass inside the valve moves it makes a clicking noise as the gas passes and pushes it up. Prob not the best now that I see it in action.

So I cut tubing about 6" under it and placed a second check valve but this one is plastic.

I figure with two check valves I'm safe
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