Hi all!
I'm building a system that uses air pressure to move a solution through very thin tubing. Because of this, I would have to use a very high pressure (probably 60 psi) for it to travel quickly through the tube. Does anyone know of any good air valves than can slowly open and close so that all the pressure is not released at once.
What kind of very thin tubing and fittings are you using? Will they be able to handle that much pressure?
How about a controllable needle valve...
https://www.clippard.com/products/control-valves-needle-valves-scpv
Most of us would consider that low pressure. If you want the 60 PSIG use a needle valve and open it slowly. There are many available. I fail to see where this involves an Arduino. I am assuming it will control the valve.
That usually is controlled by the reservoir holding the air, not the valve. Describe your air pressure system. Sounds like there is zero storage capacity.
Would probably use something called PEEK tubing with a specialized fitting set to 1/16 of an inch OD. Not sure yet if it can handle it but the valve would definitely help with this. I will look into that thank you.
I don't know what you mean by zero storage capacity but here's a prototype. The valves will be connected to the top of each tube. There's an external air pressure pump that forces a liquid to flow from one falcon tube to the other. Because it is a small system, the air pressure needs to be released gradually into the 50 ml falcon tube.
I suppose its all relative but because this is a system that is using HEK cells 60 psi is already a lot for our system to handle. Yes the arduino is meant to control the valve.
A possible way to do this with an Open/Closed valve.
I don't know how your setup would respond to this:
Use an air accumulator (aka air tank). When the need to slowly reduce pressure starts you can stop the pump and let the tank "bleed" down. And / OR you can use an open/closed air valve to bleed off the air faster than going through your system.
You can make your air tank from plumbing supplies. i.e. pipe and caps. You can fine tune the volume of your tank by adding things like rocks, marbles etc.
If that air pump does not have an air pressure storage tank, then you need to add one! Without the tank, you get the pulsing of air from the pump, not a steady air pressure that your valve can control!
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