CO2 pressurized system, builders unite! - Page 7 - The Planted Tank Forum
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post #91 of 105 (permalink) Old 10-03-2020, 02:29 AM Thread Starter
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Originally Posted by bigtrout View Post
Heres my newly installed Concoa 315 that i won on evilbay for 30. New in the box and even has a cga320 from new.

I remote mounted my Matheson flowmeter Attachment 903675
Concoa 315 regulators are rare and with 316L stainless steel diaphragms, and you got a new for $30, really good luck,


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post #92 of 105 (permalink) Old 10-04-2020, 03:48 AM
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Amazing post, thanks for providing such a important information

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post #93 of 105 (permalink) Old 10-09-2020, 04:04 AM Thread Starter
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This is my personal co2 system, I built it back in 2013, and it had been serving my planted tank until now, just renew its surface today and took some pictures.
I think this stainless steel regulator is one of the most expensive that we could find, almost $2000 price mark when new, I got it for $35...

Gauges were made in Germany, but this regulator was made in Napa, California.





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post #94 of 105 (permalink) Old 10-09-2020, 04:35 AM
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Originally Posted by Bettatail View Post
Concoa 315 regulators are rare and with 316L stainless steel diaphragms, and you got a new for $30, really good luck,

Max outlet pressure is 30psi.. from the model #.
Not to distract from the price/condition, and having the rare CGA already attached.


"field adjustable pressure limit to protect downstream equipment" also rare..
https://www.concoa.com/docs/catalogs...0Regulator.pdf

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post #95 of 105 (permalink) Old 10-09-2020, 04:52 AM Thread Starter
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Jeff, if it is a 30psi max output, the part number should be 3152...., but I don't see the part number on bigtrout's 315, are you sure it is a max 30psi output model? or may be it is a 50 psi max output model, the low pressure gauge is 60 psi.


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post #96 of 105 (permalink) Old 10-09-2020, 05:24 AM
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Originally Posted by Bettatail View Post
Jeff, if it is a 30psi max output, the part number should be 3152...., but I don't see the part number on bigtrout's 315, are you sure it is a max 30psi output model? or may be it is a 50 psi max output model, the low pressure gauge is 60 psi.

According to the "sold" item on eek bay matching his.
That guage also went up to 50psi-ish
If his had a hose barb out originally then the model is
NEW Concoa Regulator 3152391 Dual Stage CP Brass CGA 320
"Roberts Oxygen"
TOO rare of a combo to not be it..
Chrome plated brass
Let me check the spec sheet.

315(A)(B) (C) ect
A = 2: 0-30 PSIG(0-2 BAR)
B= 3: 0-4000 PSIG/0-275 BAR
C = 9: 1/4" hose barb
D = 1: Standard assembly(PSIG/kPa gauges)

303642493962

Many Victors, as you know add 2X max outlet gauges on the lp side.
Gauge markings are practically meaningless, especially with used items.

https://www.concoa.com/docs/catalogs...0Regulator.pdf

Don't get me wrong, still a good find w/ a "possible" minor limitation.
I love new or New Old Stock
Reason I decided to "snoop"..

"A man with a watch knows what time it is. A man with two watches is never sure"

Last edited by jeffkrol; 10-09-2020 at 05:39 AM. Reason: edit
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post #97 of 105 (permalink) Old 10-09-2020, 07:14 AM Thread Starter
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Jeff, I see, and I think you are right on the reg since you found the sold listing, just wait for bigtrout to confirm.
It is extremely good deal though, a new 315 in the box, for $30.


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post #98 of 105 (permalink) Old 10-09-2020, 10:21 PM
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Quote:
Originally Posted by Bettatail View Post
This is my personal co2 system, I built it back in 2013, and it had been serving my planted tank until now, just renew its surface today and took some pictures.
I think this stainless steel regulator is one of the most expensive that we could find, almost $2000 price mark when new, I got it for $35...

Gauges were made in Germany, but this regulator was made in Napa, California.





Would you believe someone had me build one these with all new parts including that regulator from swagelok? I wish I still had the pics. Loved that green handle.
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post #99 of 105 (permalink) Old 10-09-2020, 11:52 PM
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Would you believe someone had me build one these with all new parts including that regulator from swagelok? I wish I still had the pics. Loved that green handle.
It’s hard to believe. That cost thousands to build.

Bump: how about this aluminum gold handle? A build for a client.

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post #100 of 105 (permalink) Old 10-10-2020, 02:24 AM
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It’s hard to believe. That cost thousands to build.

Bump: how about this aluminum gold handle? A build for a client.

Those Parker IR’s are my fav. And yes, I thought the idea was nuts. It made me very nervous. There are people with money out there I guess.
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post #101 of 105 (permalink) Old 10-10-2020, 10:14 AM
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Quote:
Originally Posted by jeffkrol View Post
Quote:
Originally Posted by Bettatail View Post
Jeff, if it is a 30psi max output, the part number should be 3152...., but I don't see the part number on bigtrout's 315, are you sure it is a max 30psi output model? or may be it is a 50 psi max output model, the low pressure gauge is 60 psi.



According to the "sold" item on eek bay matching his.
That guage also went up to 50psi-ish
If his had a hose barb out originally then the model is
NEW Concoa Regulator 3152391 Dual Stage CP Brass CGA 320
"Roberts Oxygen"
TOO rare of a combo to not be it..
Chrome plated brass
Let me check the spec sheet.

315(A)(B) (C) ect
A = 2: 0-30 PSIG(0-2 BAR)
B= 3: 0-4000 PSIG/0-275 BAR
C = 9: 1/4" hose barb
D = 1: Standard assembly(PSIG/kPa gauges)

303642493962

Many Victors, as you know add 2X max outlet gauges on the lp side.
Gauge markings are practically meaningless, especially with used items.

https://www.concoa.com/docs/catalogs...0Regulator.pdf

Don't get me wrong, still a good find w/ a "possible" minor limitation.
I love new or New Old Stock
Reason I decided to "snoop"..

Yes, you are correct, its the 30psi model, and you picked the correct auction! I inject co2 for a 75gallon into a homemade Cerges reactor. I inject at 20psi because Matheson has a flow chart at 20psi for the 610 flowmeter tubes and my flowmeter is set with the valve on the outlet side. For my use its perfect!
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Last edited by bigtrout; 10-10-2020 at 01:59 PM.
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post #102 of 105 (permalink) Old 10-16-2020, 08:16 PM
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Would you believe someone had me build one these with all new parts including that regulator from swagelok? I wish I still had the pics. Loved that green handle.
Similar story here. There was a guy who wanted me to build him a complete ss reg. I didn't want him to spend too much so I suggested him to use steel fittings instead. He wasn't happy about it.

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post #103 of 105 (permalink) Old 10-16-2020, 09:21 PM Thread Starter
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Manufacturing is returning, not a bad thing, but it is harder and harder to source the low cost parts to build high end industrial grade co2 systems, especially the complete stainless steel sets.

a piece of Parker 316L 1/8 npt elbow is about $50, distributor listing price...

I got it much lower than the original price, but not easy to find them at a fraction of the original cost now.



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Last edited by Bettatail; 10-16-2020 at 09:34 PM. Reason: add
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post #104 of 105 (permalink) Old 10-17-2020, 04:28 PM Thread Starter
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Evil Bay item number: 353177823872

Good double stage regulator, and it is for co2 with cga320, do not need to convert.


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post #105 of 105 (permalink) Old 10-18-2020, 03:37 PM
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Evil Bay item number: 353177823872

Good double stage regulator, and it is for co2 with cga320, do not need to convert.
That’s a very good deal.
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