Looking For A Special Valve

So you're looking for a pneumatic actuator that will supply air and fluid? Try a company called "Radius". They make double action pneumatic actuator valves. If they don't have it they can surely help you to find it.

Thanks. They do appear to have what I described. Unfortunately I am looking for something much smaller.

I should have been more clear in my original post.

I want a control valve to simultaneously start and stop the flow of air and coolant solution controlled by an isolated air pilot signal. I want something with around 1/8" to 1/4" ports.

Gordie.

There are quite a few manufacturers of spring return pilot valves. What you're describing really wouldn't be a special or custom valve. SMC, Parker, Festo, Ingersol-Rand, to name a few. I can't say for Canada but here in the States we would go to McMaster-Carr, Grainger, Motion Industries, etc..

I was going to try and give you a couple of actual 5port part numbers but checked my inventory and all we have is double pilots - one on each end - nothing with spring return.

Dig through Grainger or McMaster you'll see what you need and at least be able to be really close when you talk to someone local.

Good luck

Have tried most of those and can't seem to find a twin 2-way valve and haven't been able to figure out how to pipe a 5-way valve for that function.

If you can think of a way to pipe a 5-way valve for that function please enlighten me. Maybe I'm too close to see it.

I will check the other sources you mentioned. Thanks for your help.

Gordie.

I do not see Clippard mentioned, you may have luck with them:

http://www.clippard.com/

Definite promise there. Small, water compatible, air piloted poppet valves

Thanks,

Gordie.

Why do both functions have to be in the same body?

Exactly. Two 2/2 pilot valves, connected in parallel though with different fluids in each valve, would achieve the original poster's objective.

see #13

it's avaliable ~ i can't fond it

What has been suggested so far I think are pneumatic valves. Try looking a hydraulic valves. (Typically one of the arrows in the through port will be shown reversed)

The standard porting arrangement on a two position valve will not achieve what you require. Use a '¼" three position, twin air piloted, spring return, blocked centre, valve' and leave one of the pilot ports disconnected. This will be described in the manufacturer's literature as a 4/3 valve. (Don't block the unused pilot, there will be no path for exhaust air as the spring closes the valve.)

Good points jhh.

The fluid is ~4% butyl acetate in water.

I wanted to put three to six of these on a manifold (or stacked) where they would be fairly visible so I didn't want too much extra piping of pilot lines.

Function and reliability are paramount, however, so two discrete, non-spool, fluid specific valves definitely deserve serious consideration.

Gordie.

I don't understand what process you are at temping. instead of having a single valve i would suggest a series of MOV (motor operated valves). depending on what you are trying,ther could be several or one complex sensors needed. Water contained, excess fuel (rich mixture - oxidizing, lean - reducing).

To design valves that would operate in tandend, at varying temperatures, at the same time time controlling the proper air mixture, as well as controlling moisture, using a single valve would be a time consumings, difficult, and costy effort, compared to designing a series of motor valve, and software programing.

lots of luck!

Good morning,

I apologize for the graphic above, but it is the best I could do in a hurry. If anyone has a better solution for inserting a .dwg or .pdf file into the text please advise.

The solution shown above will work for this application. It is a standard 5 way 3 position all ports blocked valve. I would plumb it as shown, and using only the "14" pilot of the valve to actuate it, you will achieve the function you have requested. Not sure where you are, but most any decent pneumatic valve supplier can help. Contact me if you would like to purchase from me.

Please rate as a GA if you (and others) approve.

Have a great day,

Fred

Your picture looks better than mine. It also looks as if it would do what I want.

Is this valve you are suggesting you could sell me compatible with the fluids involved? As mentioned above the fluid is ~4% butyl acetate in water. Will the valve function properly with pressure on port 3?

I don't know where you are located either, but not because I didn't bother to look at your message header.

Gordie

Good morning Gordie,

I'm glad you like the picture, and yes, it would do exactly what you want. Also, I fixed the location thing. I work in Grand Rapids Michigan.

The immediate problem I see is that the butylacetate -I- looked up is tough on normal sealing materials such as those used in the common valves I would recommend. The answer may lie in manifolded 2 way valves with PTFE seals. No compatibility issues there, but they are not normally air piloted either. Have you (or can you) tested your butylacetate solution on a buna-n/nitrile material such as a standard o-ring for compatibility? Perhaps since it is a weak solution it may not cause harm.

Let me know please how it affects normal seal materials and we can discuss your options as I see them from there. If you go to www.fciautomation.com and look around you will find my e-mail and phone to reach me directly.

Have a good day,

Fred

A pair of these, or similar valves should be able to work well with the fluid you have. Price seems a little high, but they are very reliable, and one part will work in either water, or air location. Good luck.

http://valvesandinstruments.com/piston-valves/1-2-npt-8290b002-asco-pitson-valve-air-operated-normally-closed.html