Micro solenoids for CO2 regulators

[jwalker314]

I am trying to adapt the control for my carbon Doser to the 0-10v output on the Apex. It seems it might be best to just make a new one from scratch that does this. Is it possible to adapt your circuit to be controlled via 0-10v signal instead of a potentiometer?

[bettatail]

besides the Clippard mouse, there is another good one.

ASCO/numatics miniature solenoid, it is full FR 430 stainless steel structure, the low power consumption model only use 0.65 watt.

[theatrus]

Originally Posted by bettatail

besides the Clippard mouse, there is another good one.

ASCO/numatics miniature solenoid, it is full FR 430 stainless steel structure, the low power consumption model only use 0.65 watt.

What’s the size of the orfice? The Clippard is nice as it has a whole range and they are all tiny

[theatrus]

Originally Posted by jwalker314

I am trying to adapt the control for my carbon Doser to the 0-10v output on the Apex. It seems it might be best to just make a new one from scratch that does this. Is it possible to adapt your circuit to be controlled via 0-10v signal instead of a potentiometer?

You’re better off making a new product for this - the 555 timer is not for voltage control. Simplest would be a tiny microcontroller with an A/D. It’s possible to do without any code but it’s a harder exercise.

[theatrus]

Originally Posted by amnesiac

Theatrus, thanks for posting this!!! I put it together using the BOM and boards and the toughest thing about it was sourcing the Clippard valves. Working for months now without issue and that's saying something since I have ZERO experience working with circuit boards. I do have a question though. My tank is really starting to take off and my calcium reactor is having some trouble keeping the PH down in my CaRX. With the rate cranked as far as it can go I wanted to know if there is some modification I can make to allow for the valve to stay open longer to allow for more CO2. Appreciate the help



Nevermind, I figured it out

No worries. What value resistor did you move to?

[bettatail]

Originally Posted by theatrus

What’s the size of the orfice? The Clippard is nice as it has a whole range and they are all tiny

not sure the exact size of the orifice, but a quick PDF search will see the number.
They occupy the similar niche in the industry, they are all small orifice miniature solenoids designed for low flow, low power consumption application, but the stainless steel numatics cost more than the Clippard mouse solenoid by at least double.
Clippard mouse is better choice due to its low cost, but numatics tolerate harsher environments.

[auntiecookie]

�������� Good job ����
A question what side fittings come on the original solenoid valve ?

[oreo57]

Originally Posted by auntiecookie

�������� Good job ����
A question what side fittings come on the original solenoid valve ?

Varies.. Manifold (single, duo, ect) come in 1/8npt or 10/32 straight threads (US versions)

"In line" version is 10/32 only I believe..
https://www.clippard.com/downloads/P...Page%20183.pdf

[Bryan]

The clippard valves in question I believe have a response time of around 10ms. What did you find was a good compromise for the "on" time of the pulse. Shorter the pulse I assume gives you a smaller bubbler and vice versa with a longer "on" time.

[theatrus]

Originally Posted by Bryan

The clippard valves in question I believe have a response time of around 10ms. What did you find was a good compromise for the "on" time of the pulse. Shorter the pulse I assume gives you a smaller bubbler and vice versa with a longer "on" time.

Pretty much. I tend to set around 50ms of on time, though I may be misremembering the time. It’s usually very easily audible if you’ve dropped the clipboard valve time too short as the clicking stops.

[Bryan]

Thanks, much appreciated. I see so if the timing is too short the valve won't actuate. That would probably be anything less than 15ms. Think the "on" period depends on the pressure, setup, tubing diameter etc, each setup will be different. Will use a trim pot and adjust the "on" time for my particular setup. Should be a set once and forget setting.