Flow meters for our pressurized co2 system - Page 7 - The Planted Tank Forum
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post #91 of 124 (permalink) Old 03-24-2020, 10:06 PM
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Originally Posted by Kubla View Post
I got my Parker Flow meter from the Bay (Thanks for the link Bettatail!). Now I'm completely confused on the fittings. The bag in the pic identifies this fitting as a 3/8"OD by 1/8"MIP. (I've never seen a threaded fitting size identified by "OD") If I do a search on Menard's it doesn't come up. If I search by the part number (on the bag) it does come up, but identifies it as an 1/8" compression x 1/8" mip and it comes with a nut, ferrule and sleeve. It looks like it's about the right size if you remove the extra parts. I decided to take a chance and order since the total with shipping would be less than $12. They won't ship it to California because of hazardous material. (Gotta love it.) So does the threaded side of an 1/8" compression fitting work with an o ring added? I want to get it righ so I can order it. Not a good time to go shopping!

Just to clarify - yes, once you remove the compression nut and add the O-ring, it threads into and seals up to the flow meter just fine.


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post #92 of 124 (permalink) Old 03-24-2020, 11:15 PM
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I think I've got what I need, at least for the next step. Thanks for the help!
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post #93 of 124 (permalink) Old 04-02-2020, 11:28 PM
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I still have my fleabay flow meter sitting here unused. I have a 20lb CO2 tank that feeds 3 aquariums using 2 dwyer RMA-151-SSVs, a Y splitter, and a cheap airline ball valve to restrict flow to the 10gal tank. It's not pretty, but it's working. I haven't gotten around to plumbing in the new flow meter yet.

I also searched these parts out on menards, and I thought I'd share the direct links:

1/8" Compression x 1/8" MIP is the adapter, and 3/8" x 1/4" O-Ring (#5) is the O-ring that Immortal1 posted about a few weeks back.

I'm not going to order these just yet -- if I can find the same stuff at Lowe's across the street, that will be cheaper for me; shipping on $8 worth of stuff doubles the price.
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post #94 of 124 (permalink) Old 04-12-2020, 04:26 AM Thread Starter
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The parker/porter B-125-6 flow meter for co2 flow rate calculation was wrong, I measure the actual co2 flow rate on the porter flowmeter today, and got some result, not the complete measurement though, only half way done.

scale --flow rate(SCCM, 1 ATM or 0 psig, 70 F)
1 --4.22
2 --5.47
3 --8.17
4 --11.04
5 --13.3
6 --15.5
7 --18.33
8 --21.7
9 --25.5
10 --28.3
11 --31
12 --34.5
13 --37.5
14 --42
15 --46
and I will measure the actual co2 flow rate under different pressure.


there is a new flow meter that we can use, evil bay key word: Adjustable Oxygen Flow Meter 100 psig
it is fairly large flow rate meter originally for oxygen at 100 psig, no brand but it is actually a Key instruments(best build quality IMO) 65mm flowmeter, and I did calibration measurement today for this flow meter, below is the co2 flow rate at 1 ATM
scale --flow rate(SCCM, 1 ATM or 0 psig, 70 F)
0.5 --2.25
1 --5.9
1.5--9.3
2 --10.5
3 --15.3
4 --17.2
5 --20.8
6 --22.16
7 --24.7
8 --27.5
9 --30.5
10 --33
11 --37
12 --39.5
13 --41.5
14 --43.5
15 --45.5
16 --48.5
17 --50.5
18 --53

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Last edited by Bettatail; 04-15-2020 at 05:17 AM. Reason: add
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post #95 of 124 (permalink) Old 04-15-2020, 05:25 AM Thread Starter
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both the Porter B-125-6 and Key instruments G102 flow meter calibration data(real measurement) at 1 ATM(0 psig, 70 F) completed and have been added to the post above, and the first post of current thread.
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post #96 of 124 (permalink) Old 04-17-2020, 11:15 PM Thread Starter
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The key instruments 65mm flow meter.

This one is calibrated for direct oxygen flow rate reading at 100psig, but the flow tube should be the same as a G102 model(for air), enough good precision for our co2 flow rate control/monitoring, and I think this flow meter has the best build quality among the 65mm flow meters.

there is magnify lens on the plastic shell for easy reading.







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post #97 of 124 (permalink) Old 04-22-2020, 11:00 PM
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Quote:
Originally Posted by zivvel View Post
I still have my fleabay flow meter sitting here unused. I have a 20lb CO2 tank that feeds 3 aquariums using 2 dwyer RMA-151-SSVs, a Y splitter, and a cheap airline ball valve to restrict flow to the 10gal tank. It's not pretty, but it's working. I haven't gotten around to plumbing in the new flow meter yet.

I also searched these parts out on menards, and I thought I'd share the direct links:

1/8" Compression x 1/8" MIP is the adapter, and 3/8" x 1/4" O-Ring (#5) is the O-ring that Immortal1 posted about a few weeks back.

I'm not going to order these just yet -- if I can find the same stuff at Lowe's across the street, that will be cheaper for me; shipping on $8 worth of stuff doubles the price.
hmm dont order online from that link they sent a watts to me with that order number and its not the same waist of 20$. It dont have the piece I need. Heres what I was sent ]
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post #98 of 124 (permalink) Old 04-23-2020, 01:36 AM
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hmm dont order online from that link they sent a watts to me with that order number and its not the same waist of 20$. It dont have the piece I need. Heres what I was sent ]
So you're saying that the 1/8 compression side of that fitting doesn't fit your meter?

That is not good news for me -- I have something similar on order from amazon, "arriving April 23 - April 28." I ordered from amazon because I wanted elbows specifically, to go with the rest of my CO2 manifold.
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post #99 of 124 (permalink) Old 04-23-2020, 01:59 AM
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Originally Posted by zivvel View Post
So you're saying that the 1/8 compression side of that fitting doesn't fit your meter?

That is not good news for me -- I have something similar on order from amazon, "arriving April 23 - April 28." I ordered from amazon because I wanted elbows specifically, to go with the rest of my CO2 manifold.
I can assure you that if you have the aluminum frame Porter B-125-6 flow meter, the compression side of a 1/8"od x 1/8" MIP adapter will thread in.

Also, my apologies for the pic below as I included the wrong plastic bag in the pic.


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post #100 of 124 (permalink) Old 04-23-2020, 02:30 AM
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A reminder if you have flowmmeter w/ the orig fitting(s) removed (smooth back).
Quote:
without the adapter, the thread is 5/16-24 for porter, Brooks flow meters , and 3/8-24 for matheson, aalborg, cole palmer, gilmount flow meters.
THREAD sizes not fitting size.
Inch size is 1/8 and 3/16 respectively.
Quote:
SAE Straight Thread O-ring (O-Ring Boss)
SAE J1926-1 and ISO 11296-1

The female port of the O-Ring Boss has a sealing face, chamfer, and a straight thread. The male connector has an O-ring and a straight thread. The seal is made when the O-ring is squeezed into the chamfer. The male and female threads bind together to make a mechanically strong connection. This connection is common in high pressure hydraulic systems.
https://www.hydraulicsdirect.com/Fit...art-s/1934.htm

Radwell has some Parker adaptors in the correct size:
https://www.radwell.com/en-US/Buy/PA...-1-DIV-8F5OG-S
2-1/8 F5OG
5/16 - 24 end one..
1/8 - 27 NPTF end 2
.

Parker doesn't carry the 3/16 -3 size (3/8-24 threads)

Female end makes finding barbs easier btw..

https://www.parker.com/literature/Tu...t_Adapters.pdf
pg13...(F)

I suppose if you got the flared end ones that fit (thread wise) you may need to grind off the flare so it fits..???

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Last edited by jeffkrol; 04-23-2020 at 03:14 AM. Reason: edit
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post #101 of 124 (permalink) Old 04-23-2020, 02:43 AM
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Quote:
Originally Posted by Immortal1 View Post
I
Still trying to figure out the 3/8 thing..

3/8 is od of male threads for the 3/16-3 fitting. See
Quote:
SAE Straight Thread O-ring (O-Ring Boss
)
https://www.hydraulicsdirect.com/Fit...art-s/1934.htm

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post #102 of 124 (permalink) Old 04-23-2020, 03:27 AM
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Quote:
Originally Posted by zivvel View Post
So you're saying that the 1/8 compression side of that fitting doesn't fit your meter?

That is not good news for me -- I have something similar on order from amazon, "arriving April 23 - April 28." I ordered from amazon because I wanted elbows specifically, to go with the rest of my CO2 manifold.

When it comes in and if it works can you please post a link so I can order 2 and get this thing to work.

I got the last one on auction. My Dad passed away so didnt have time to order the fittings but when I followed the link this is all that came in both bags from that link .
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post #103 of 124 (permalink) Old 04-23-2020, 09:10 PM
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Quote:
Originally Posted by jpitbull View Post
Bump:


When it comes in and if it works can you please post a link so I can order 2 and get this thing to work.

I got the last one on auction. My Dad passed away so didnt have time to order the fittings but when I followed the link this is all that came in both bags from that link .
That sucks, and it looks like you got hosed. That is the nut that goes on the adapter, but that adapter should have also been included. That's what you paid for. You should contact the store and tell them they didn't send you the right stuff. It's the right bag, but the bag is missing contents. It should have had all this:

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post #104 of 124 (permalink) Old 04-23-2020, 09:37 PM
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Originally Posted by jeffkrol View Post
Still trying to figure out the 3/8 thing..

3/8 is od of male threads for the 3/16-3 fitting. See )
https://www.hydraulicsdirect.com/Fit...art-s/1934.htm
I see what you are asking Jeff. But, in this case, the item we are using is an adapter to go from 1/8"od tube compression fitting to 1/8" pipe thread.
The picture just above this post is what the complete contents should look like.
Again, I grabbed the wrong plastic bag :-)


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post #105 of 124 (permalink) Old 04-23-2020, 10:36 PM
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Again, I grabbed the wrong plastic bag :-)

AHHH.. I get it now..
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