[mistergreen]

What do you tech guys think?

http://www.clippard.com/downloads/g...ct Data Sheets/Clippard EVPD Valve Driver.pdf

Can it be used as a solenoid & needle valve combined?
I think you need a controller but it would be nice to control the bubbles/sec electronically instead with a knob.


Video of the setup.
http://www.youtube.com/watch?v=EY0_1anzztw&feature=channel_video_title

 

[oldpunk78]

It will work. Seems like an expensive solution though at $109(board only). If I was going to spend that much on a needle valve, I think I would rather just have a V54-1-12.

If you're tech savvy, I would suggest just doing something like this:

http://www.aquaticplantenthusiasts....oleniod-controlled-timed-bubble-delivery.html

 

[btimmer92]

So this is kinda just like AP.com's carbon doser electronic regulator post body?

 

[oldpunk78]

^ no. the one I linked is.

I think mistergreen is talking about using it with a programmable electronic controller with buttons and a screen.

 

[mistergreen]

Oh, ouch. I didn't see the price. Yeah I have a microprocessor board and an LCD laying around. You can build your own driver for $50. I'll have to get the variable valve and play with it.

 

[btimmer92]

sounds like a good idea, but honestly, those electronic post bodies do no good if they are paired with a single stage regulator, because it makes the user think that they can set it and forget it because the bubble count stays the same, however if the pressure varies, and it will with a single stage, then the flow of co2 will also vary. You still have to monitor and adjust pressure.

That is why I honestly hate how AP.com calls their electronic single stage regulator the best in the world. That is such bull. Maybe it would be if it was a dual stage regulator...

 

[jreich]

that looks like it will just over complicate things, just another thing to go wrong. the more things you add into the mix the more likely of something to break.

 

[maknwar]

one thing I have learned in my life is that electronics go bad more frequently than any other parts. I think I will stick to what I know works. Thanks for sharing that though.

 

[btimmer92]

one thing I have learned in my life is that electronics go bad more frequently than any other parts. I think I will stick to what I know works. Thanks for sharing that though.

Agreed. Nothing better than a solid, quality regulator built with metal, mechanical parts. Beside the solenoid of course...

 

[mistergreen]

one thing I have learned in my life is that electronics go bad more frequently than any other parts. I think I will stick to what I know works. Thanks for sharing that though.

I don't know.. It can go either way. My car electronics lasted way longer than my exhaust pipes and engine

Oh! you SW Ohio guys, you can get Clippard parts in a shop in Mason-Ohio. Saves you shipping & handling. Call them up and they can get the parts for you.
Clippard is in Cincy but they don't have a store front you can go get stuff.

 

[jreich]

i firmly believe in K.I.S.S.

 

[OverStocked]

sounds like a good idea, but honestly, those electronic post bodies do no good if they are paired with a single stage regulator, because it makes the user think that they can set it and forget it because the bubble count stays the same, however if the pressure varies, and it will with a single stage, then the flow of co2 will also vary. You still have to monitor and adjust pressure.

That is why I honestly hate how AP.com calls their electronic single stage regulator the best in the world. That is such bull. Maybe it would be if it was a dual stage regulator...

This again>??? Many people have used single stage regs for eons and eons and they have no more problems than everyone else
..... Lets not make this thread about that, too.

G-I've got a proportional valve that I may be able to send your way. Shoot me pm.

 

[Bettatail]

it works, or might not work, if it works, but you still need a needle valve act as the fix orifice to lower the flow.

It works:
now it is like two valves, the first is the proportional valve that can alter the flow rate, the input pressure is fixed, the output pressure is a variety since the valve door(opening, cross-flow area) is a variety also.
The second valve is the needle valve that act as the fix orifice(opening) flow valve, to further lower the flow rate, the input pressure of this valve is decided by the flow rate/volume from the first valve and the cavity/space between the two valves.
The math is complicated on the second valve to find out the flow rate due to more factors involved, but it can be treated as "proportional" because the change of flow volume from the first valve immediately affect the input pressure for the second valve due to small cavity between two valves.


It might not work:
the flow rate on the proportional valve is too large compare to the second/needle valve.
If the flow rate is large, the output pressure of the proportional valve is not that much lower/alternation than it is input pressure due to small space between two valves and extremely low flow rate on the second valve. So no matter how much you adjust the proportional valve, the output pressure(air pressure in the cavity) is pretty much stay the same.
In this case the output pressure of proportional valve, or input pressure for second valve can be treated as a constant, and there is no change on the flow rate for second valve(fixed orifice)

 

[Bettatail]

What do you tech guys think?

http://www.clippard.com/downloads/g...ct Data Sheets/Clippard EVPD Valve Driver.pdf

Can it be used as a solenoid & needle valve combined?
I think you need a controller but it would be nice to control the bubbles/sec electronically instead with a knob.


Video of the setup.
http://www.youtube.com/watch?v=EY0_1anzztw&feature=channel_video_title

try it, so we will know if it works,

I wish I can write a driver too, but need to get myself on track and learn how to write one.

 

[maknwar]

I don't know.. It can go either way. My car electronics lasted way longer than my exhaust pipes and engine

Oh! you SW Ohio guys, you can get Clippard parts in a shop in Mason-Ohio. Saves you shipping & handling. Call them up and they can get the parts for you.
Clippard is in Cincy but they don't have a store front you can go get stuff.

You still in cinci? I did get clippard stuff from mason, swagelok in cincy, fabco in cincy, and some other stuff local. All without paying for shipping. Not bad eh?

Your right, clippard charges $10 because they want you to order from a distributor.

 

[Bettatail]

You still in cinci? I did get clippard stuff from mason, swagelok in cincy, fabco in cincy, and some other stuff local. All without paying for shipping. Not bad eh?

Your right, clippard charges $10 because they want you to order from a distributor.

I am a little jealous, my local clippard distributor is only 15 minutes away but the minimum requirement is $250, and they don't stock parts.

btw, I got the package you send me, will leave a positive itrade, thank you.

 

[maknwar]

I am a little jealous, my local clippard distributor is only 15 minutes away but the minimum requirement is $250, and they don't stock parts.

btw, I got the package you send me, will leave a positive itrade, thank you.

I know, I can order just about anything and any amount and get it for just list + 6.5% tax.

Clippard is a little funny with their ways though. Most of the parts we use are not stocked at local distributors so they have to have it shipped to them. Cant imagine how they make money like that, unless it goes on a delivery with other things.

 

[mistergreen]

You still in cinci? I did get clippard stuff from mason, swagelok in cincy, fabco in cincy, and some other stuff local. All without paying for shipping. Not bad eh?

Your right, clippard charges $10 because they want you to order from a distributor.

No kidding? Didn't know swagelok and fabco are in cincy.

Would love to experiment on this but time is pretty tight. I study on my free time. I need a break from free time.