Flow meters for our pressurized co2 system - Page 6 - The Planted Tank Forum
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post #76 of 114 (permalink) Old 03-16-2020, 11:50 PM
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Originally Posted by minorhero View Post
I got an email from Forberg a few minutes ago. Apparently they want 67 dollars for the flow tube and require a minimum order of 10 flow tubes (so 670 dollars). That kind of makes replacing the flowtube a non starter for me. I think I read in this thread we can replace just the float? Is that possible? Can I just order a steel ball bearing and go from there? I haven't tried taking mine apart yet to see if this is doable.

Something @Bettatail mentioned, if you put the flow control knob at the output position (bearing in mind that the pressure in your tube from the flow meter to the reactor will always be the same), you can raise your regulator pressure. This added pressure (up to the flow control valve on the flow meter) means each cc of CO2 has a denser concentration of CO2 and thus, you actually need less flow thru the flow meter. As he pointed out in post 1, your math adjustment for pressure is 1.5x for 18psi and 2.0x for 45 psi.
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post #77 of 114 (permalink) Old 03-17-2020, 12:06 AM
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Right now the flowmeter is perfect. I have it on a 40 gallon breeder. But.. I plan to down the road move this to a 120 gallon that doesn't exist yet. I am trying to future proof myself for that reason. I don't think I will be able to get by with the same float for the 120 gallon with sump as I do for the 40 gallon with canister filter.
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post #78 of 114 (permalink) Old 03-17-2020, 03:47 AM
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Originally Posted by minorhero View Post
Right now the flowmeter is perfect. I have it on a 40 gallon breeder. But.. I plan to down the road move this to a 120 gallon that doesn't exist yet. I am trying to future proof myself for that reason. I don't think I will be able to get by with the same float for the 120 gallon with sump as I do for the 40 gallon with canister filter.

I don't know.. You could be in the 60mL/minute range for a sump/160 gal tank..
Estimates from here:



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post #79 of 114 (permalink) Old 03-17-2020, 10:40 AM
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I don't know.. You could be in the 60mL/minute range for a sump/160 gal tank..
Estimates from here:


https://youtu.be/h2_nj08QwfY
Doesn't a ml translate to 1 cubic centimeter?

I figured the current setup with glass ball is good for like 35 cc per minute? But the steel ball is good for 105 cc per minute right? Hence my desire for the steel ball.


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post #80 of 114 (permalink) Old 03-17-2020, 02:09 PM
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Originally Posted by minorhero View Post
Doesn't a ml translate to 1 cubic centimeter?

Yes

Quote:
Originally Posted by minorhero View Post
I figured the current setup with glass ball is good for like 35 cc per minute? But the steel ball is good for 105 cc per minute right? Hence my desire for the steel ball.
I "lost" which exact tube you had and it's max output.
Posed the above just to get some point of reference for large tanks w/ sumps and a flow rate number..


If the above is "your" numbers than yea you won't have enough max flow...


Oh yea, forgot b-125-6 w/ Air rate 34mL/minute..STP.


35 x 1.2 = 42 mL/minute CO2 max...STP


Still lower than "what others use"
I think "we" need a few more estimates on "normal" actual flow rates..
Besides you might find a float by the time of the new tank..


OK it's not really easy in finding examples that one can trust 100% (mine included btw)


Quote:
Throwing my numbers for comparison.
according to my flow meter im at 80ish cc/min. 134 Gall w/ 55 gallon sump, I have a power head on it if it matters. about 20 PSI working pressure. modified cerges reactor.
if i run a co2 line straight from my flow meter to the sump im at 95~100 cc/min, inverted cup method matches this number.

At least it's sort of calibrated..


In light of how things are shaking out it's almost better to just get a new flowmeter when the time comes.
I'm not a fan of bleeding edge CO2 delivery but that is just me..



Quote:
One pound (454 grams) of carbon dioxide CO2 gas occupies 0.2426 m3, or 8.566 ft3, or 64 US gallons, or 243 liters your choice of units!
242000 cc's/ lb..


1lb lasts 40 hours at 100cc/min...5 days,,
sound right??
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post #81 of 114 (permalink) Old 03-17-2020, 02:39 PM
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Quote:
Originally Posted by jeffkrol View Post
Yes


I "lost" which exact tube you had and it's max output.
Posed the above just to get some point of reference for large tanks w/ sumps and a flow rate number..


If the above is "your" numbers than yea you won't have enough max flow...


Oh yea, forgot b-125-6 w/ Air rate 34mL/minute..STP.


35 x 1.2 = 42 mL/minute CO2 max...STP


Still lower than "what others use"
I think "we" need a few more estimates on "normal" actual flow rates..
Besides you might find a float by the time of the new tank..


OK it's not really easy in finding examples that one can trust 100% (mine included btw)



At least it's sort of calibrated..


In light of how things are shaking out it's almost better to just get a new flowmeter when the time comes.
I'm not a fan of bleeding edge CO2 delivery but that is just me..




242000 cc's/ lb..


1lb lasts 40 hours at 100cc/min...5 days,,
sound right??
Yeah I might just have to accept I will need a new meter when I get the new tank. Ohs well if I can make it work I will /shrug.


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post #82 of 114 (permalink) Old 03-17-2020, 04:47 PM Thread Starter
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Yeah I might just have to accept I will need a new meter when I get the new tank. Ohs well if I can make it work I will /shrug.
I don't think you need a new flowmeter, I will explain later.


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Last edited by Bettatail; 03-18-2020 at 03:26 AM. Reason: later not laterly, :P
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post #83 of 114 (permalink) Old 03-18-2020, 09:39 PM
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Would this be an acceptable flow meter for my CO2 tank? Seems pretty inexpensive at $28, just would like to make sure I am not wasting money...


Ok, not sure why this thing keeps removing my link, but here it is again,

/itm/Porter-Instruments-Flowmeter-F65-SV3-A25Q-6-B3086-0-120-SCFM/153176633365


Just put the normal ebay url in front of it...

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post #84 of 114 (permalink) Old 03-18-2020, 09:53 PM
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Would this be an acceptable flow meter for my CO2 tank? Seems pretty inexpensive at $28, just would like to make sure I am not wasting money...


Ok, not sure why this thing keeps removing my link, but here it is again,

/itm/Porter-Instruments-Flowmeter-F65-SV3-A25Q-6-B3086-0-120-SCFM/153176633365


Just put the normal ebay url in front of it...

Well it's sold and prob not..
looks like an A-250 tube.. so
42400cc/min max flow w/ a small height tube.

https://www.parker.com/Literature/Li...0pp.%204-7.pdf

Ok let's just say.. no...............
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Last edited by jeffkrol; 03-18-2020 at 10:05 PM. Reason: edit
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post #85 of 114 (permalink) Old 03-19-2020, 12:37 AM Thread Starter
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Originally Posted by MD500_Pilot View Post
Would this be an acceptable flow meter for my CO2 tank? Seems pretty inexpensive at $28, just would like to make sure I am not wasting money...


Ok, not sure why this thing keeps removing my link, but here it is again,

/itm/Porter-Instruments-Flowmeter-F65-SV3-A25Q-6-B3086-0-120-SCFM/153176633365


Just put the normal ebay url in front of it...
as jeff said, no, this model is off our co2 injection range.

for what size planted tank you want a high precision flowmeter? I may find you a good one from evilbay, you can also check my metering valve selection thread to do your own research.
they are normally $250 a piece, cheap on evilbay because no others realize what they can do for our planted tank, now the porter B-125-6 has gone, depleted, but there are still some other brands on evilbay, not many and it is only a matter of time these flowmeters will be gone as well.


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post #86 of 114 (permalink) Old 03-19-2020, 12:55 AM
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Just popping in to say this is a very useful thread and so is the one about metering valves.
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post #87 of 114 (permalink) Old 03-19-2020, 02:23 AM
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Originally Posted by Bettatail View Post
as jeff said, no, this model is off our co2 injection range.

for what size planted tank you want a high precision flowmeter? I may find you a good one from evilbay, you can also check my metering valve selection thread to do your own research.
they are normally $250 a piece, cheap on evilbay because no others realize what they can do for our planted tank, now the porter B-125-6 has gone, depleted, but there are still some other brands on evilbay, not many and it is only a matter of time these flowmeters will be gone as well.
Thank You. I currently have a 75 gallon but looking to move to a 210 gallon. I currently use a bubble counter that came with my CO2Art Regulator along with a PH Controller. I am not too worried about too much CO2 since I have the ph controller sans a catastrophic meltdown of the solenoid on the regulator.

I'll take a look at your other post. Thank You

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post #88 of 114 (permalink) Old 03-22-2020, 08:11 AM Thread Starter
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post one updated, new co2 injection methods.

let me know what you think about the new method, good and bad, nothing is perfect.


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post #89 of 114 (permalink) Old 03-24-2020, 08:58 PM
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Well, this was surprising. Stopped by Menard's today and bought a couple different items based on what @Bettatail posted. Turns out the items shown below will work on the forged frame porter flow meter.


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!
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post #90 of 114 (permalink) Old 03-24-2020, 09:32 PM
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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!
Check out my post #72. This is the part I ended up with. It needs adaptation but after that it worked.


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