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Old 02-02-2003, 10:41 AM   #1 (permalink)
 
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What are the required elements of a LOW pressure CO2 system? Can a LOW pressure system be equipped with a pH controller?
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Old 02-02-2003, 10:41 AM   #2 (permalink)
 
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What are the required elements of a LOW pressure CO2 system? Can a LOW pressure system be equipped with a pH controller?
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Old 02-02-2003, 11:13 AM   #3 (permalink)
 
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The required elements are just what you would expect:

Tank-> Regulator-> Needle valve-> Check valve (optional, I guess)-> Reactor.

Of course you can use a controller. It would look like this:

Tank-> Regulator-> solenoid w/ controller (totally optional)-> needle valve-> check valve-> etc....

The old high pressure setup was like this....It's been pretty decisively deemed unsafe:

Tank-> regulator-> check valve-> diffuser

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John Wheeler
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Old 02-02-2003, 11:59 AM   #4 (permalink)
 
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John, would a metering valve be any better than a needle valve? And what the heck is a metering valve? I'm engineering challenged.
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Old 02-02-2003, 12:56 PM   #5 (permalink)
 
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I don't know what a metering valve is....Seems to me that it's sold as a step up from needle valves, though, but I don't know for sure.

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John Wheeler
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Old 02-02-2003, 01:30 PM   #6 (permalink)
 
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John, I'm going to open some related topics regarding the individual components. I'm deciding on going this route as the inconsistancies of DIY Yeast Bottle type and Carbo-Plus frustrate me. I know the initial outlay is greater and it will delay my purchase of other toys, but I want to go over 3w./gal.and hate algae.
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Old 02-02-2003, 01:49 PM   #7 (permalink)
 
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It really is the best way to go. I don't know how I got along without my gas set-up.

Best wishes,
John Wheeler
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Old 02-02-2003, 01:58 PM   #8 (permalink)
 
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Roger,
I believe a metering valve is just a glorified needle valve, maybe a little more precise. I think there was a lengthy discussion on the Krib about them.

Fred
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Old 02-02-2003, 02:25 PM   #9 (permalink)
 
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Thanks Fred, I'll have a peek.
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Old 02-02-2003, 04:38 PM   #10 (permalink)
 
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A metering valve is basically just a much more precise needle valve. And a lot more expensive. Only real techo-geeks, anal-retentive engineers or those with more dollars than sense will feel the need to have a metering valve over a needle valve.

Semper Fi
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