Newbie questions: Metering valve flow directional? And is this regulator ok?

Hey folks, I'm new here. I was lurking around here when I came across this on ebay:


It's a Concoa 312-2331. Purchase price was $25+ shipping.

I know I'll have to swap the bottle stem to a CGA-320 fitting but other then that this should be perfect right? Anyone see any problems with me using this to supplement CO2?

Second, are metering valves directional like a check valve or can I install it either way? I've been contemplating a DIY bubble counter and how it will join to my metering valve. Should be interesting.

Third, are these check valves good to go? [Parker 2M-C2L-1/3-SS Stainless Steel Check Valve] The C4L series has a Cv of .73 and I heard of a few people using those. These C2L series have a Cv of about half that.

This will be going on a 100gal.

Thanks folks!

 

Thanks for the reply.

Well, according to the whole part number (312-2331-01-580) it was originally a nitrogen regulator. Looks as though the bottle nipple and that 400psi gauge have been swapped out though. Maybe I'll be lucky and not have to swap the bottle nipple if it's already the right one.

Thanks for the link to the other regulator. I sent that guy an email.

Are you saying that the check valve I listed won't work well? [Parker 2M-C2L-1/3-SS Stainless Steel Check Valve]

 

I'm not worried about the 400psi gauge at all. A replacement 60psi gauge is only $10 locally. I may even have one already buried somewhere in the basement.

It does make me wonder why someone put that 400psi gauge on that regulator though. I'm hoping the regulator it is what the part-number label says it is.

 

Delivery pressure yes, but delivery pressure range? I was under the impression springs and probably other internal stuff needed to be swapped to change the delivery pressure range.

Edit to add: Ah, yea I see what he did. Adjusting the 1st stage regulator will let us really use 100% of the co2 in a tank but it will not change the delivery pressure range. So if the regulator is meant for say, a 0-400psig range (too high for us) the 2nd stage knob will adjust from 0 to the 1st stage limit very quickly, but as you keep spinning the knob through it's normal range there won't actually be any change on the 2nd stage gauge. It will just be dead band. What little adjustment you have will still feel like a 0-400psig regulator.

Edit to add: Was that REALLY a Concoa 432 series regulator? I mean holy bejesus! Where did he find that cream of the crop regulator? That's a $1000 reg! Sure would like to find one of them myself on ebay.