CO2 needle valve...opinions? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 01-13-2017, 06:45 PM Thread Starter
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CO2 needle valve...opinions?

I'm just getting into the planted tank scene, and working on putting together my CO2 system. I've seen multiple discussions of metering valves and such. Trying to lower the cost a bit from the higher priced Hoke and Swagelok valves. I found these valves that sound good and the brass version has the good Buna seals. Let's get some opinions.

https://www.dakotainstruments.com/valves/needle-valves/barstock-utility-valve-cv-brass
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post #2 of 6 (permalink) Old 01-13-2017, 07:10 PM
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Quote:
Originally Posted by ScapeNewb View Post
I'm just getting into the planted tank scene, and working on putting together my CO2 system. I've seen multiple discussions of metering valves and such. Trying to lower the cost a bit from the higher priced Hoke and Swagelok valves. I found these valves that sound good and the brass version has the good Buna seals. Let's get some opinions.

https://www.dakotainstruments.com/va...valve-cv-brass
This..6ACV1101

Quote:
0.052 0.03
Looks to compare spec wise w/ this:

Item # 1315M4B, Milli-Mite 1300 Series Forged Metering Valves On Circle Valve Technologies Inc.
Quote:
0.047 in
Cv Factor
0.024
59 vs 84...at least as new..

Some of the others look more fun..like this one:
6ATV2101

NOT recommending one over another btw..

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post #3 of 6 (permalink) Old 01-14-2017, 09:28 PM
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I took me a bit but I found a Swagelok 'S' series needle valve on ebay for a good price. It was worth every penny. Coupled with a low output pressure dual stage regulator (also on ebay) I have a rock solid, steady CO2 system that is super easy to adjust with great refinement. If you don't want to go used then I would suggest saving your pennies and getting a good setup. Piece of mind and not having to constantly fiddle with settings is great. I set this up back in 2011 and it is still running great.
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post #4 of 6 (permalink) Old 01-16-2017, 05:13 PM
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I just bought their metering valve, and it works fantastic. I would recommend this one over the one you have picked. It is far more precise and can be dialed in much finer.

https://www.dakotainstruments.com/va...-straight-flow
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post #5 of 6 (permalink) Old 01-16-2017, 05:22 PM
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Originally Posted by jellopuddinpop View Post
I just bought their metering valve, and it works fantastic. I would recommend this one over the one you have picked. It is far more precise and can be dialed in much finer.

https://www.dakotainstruments.com/va...-straight-flow
There are 6 models.. which one?

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post #6 of 6 (permalink) Old 01-16-2017, 05:29 PM
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Quote:
Originally Posted by jeffkrol View Post
There are 6 models.. which one?
6AMV1101

I'm running about 4bps @ 35lbs right now. The low end could easily be .25 bps, and I have no idea what the high end is (haven't needed to push it past 4 bps).

Edit: Also, don't be fooled by the statement that they are panel-mountable. They're not...
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