co2 system, a stainless steel check valve - The Planted Tank Forum

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post #1 of 24 (permalink) Old 02-27-2014, 06:22 PM Thread Starter
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co2 system, a stainless steel check valve

One of the hobbyists asks me in the pm, what is a good alternative of expensive swagelok or parker hannifin system mounted check valve, I do have the answer, but figure to answer here is better, more people will know.

Swagelok and Parker Hannifin check valves are really good, but price tag are huge and most require tube end adapters.

here is another good Stainless steel industrial/lab grade check valve, it is the SMC 210 series, piston design, 1/8 npt ports, ready to connect, and, much cheaper...


SMC 210 series check valve.
321336648884

all parts are saltwater rated 316/316L stainless steel in the picture.



Last edited by Bettatail; 02-28-2014 at 09:14 AM. Reason: add
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post #2 of 24 (permalink) Old 02-27-2014, 08:55 PM
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Thanks. I just grabbed two of them.

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post #3 of 24 (permalink) Old 02-27-2014, 09:10 PM
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Why didn't you post this a couple weeks ago! Very nice. I like the size too. My swagelok check valves are twice that size.

Btw, that is a sweet needle valve. I love the silver handle.
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post #4 of 24 (permalink) Old 02-27-2014, 09:29 PM
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The 210 also comes in brass (~$9) with cracking pressures of 0.33psi or 1psi. It also comes in nickel-plated brass but is listed under the AK series (~$11): AKH for push-connect and AKB for bushing type with cracking pressure of 0.72psi.

I recommend the push-connect if not using a hard-plumbed BC.

Last edited by Solcielo lawrencia; 02-27-2014 at 10:26 PM. Reason: Added and changed cracking pressures.
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post #5 of 24 (permalink) Old 02-27-2014, 11:11 PM
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Are these re-buildable?
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post #6 of 24 (permalink) Old 02-28-2014, 02:38 AM
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There's a C clip that holds the assembly together.
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post #7 of 24 (permalink) Old 02-28-2014, 02:49 AM
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Well those didn't last long now did they? I was going to get a couple but had to wait until I got off work and then I go to buy them and there all gone. Oh well I guess I will keep an eye out for them again. Thanks for the info Bettatail.

Edit: nvm I found them. I guess I wasn't looking good enough

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post #8 of 24 (permalink) Old 02-28-2014, 02:53 AM
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Got one from Bettatail. I didn't know it was a check valve. It looked like a 1/8 Male to 1/8 Female nut.

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post #9 of 24 (permalink) Old 02-28-2014, 06:39 AM
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Good stuff Bettatail, !



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post #10 of 24 (permalink) Old 02-28-2014, 11:26 AM
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Quote:
Originally Posted by Solcielo lawrencia View Post
There's a C clip that holds the assembly together.
Thank you.
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post #11 of 24 (permalink) Old 02-28-2014, 12:52 PM
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I just grabbed one
thanks
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post #12 of 24 (permalink) Old 03-01-2014, 01:35 AM Thread Starter
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post #13 of 24 (permalink) Old 03-01-2014, 02:40 AM
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Quote:
Originally Posted by Bettatail View Post
I guess the quiet guys are the ones buy many
Lol! There were more than 10 on fleaby. Now they are all gone.

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post #14 of 24 (permalink) Old 03-01-2014, 03:30 AM
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Quote:
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Lol! There were more than 10 on fleaby. Now they are all gone.

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7 still available.
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post #15 of 24 (permalink) Old 03-01-2014, 04:31 AM
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Originally Posted by rdmustang1 View Post
7 still available.
I like the one with the quick cinnoct. It saves you some lengths

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