Air to series of valves

by mike
(Halifa, ns, Canada)

Compressed air to series of valves opening and closing one at a time, one after another. Valve activated from 12v battery using remote control. Valve opens to allow a burst of compressed air into the chamber than closes. There by allowing the next valve in the series to open and close upon activation.

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Bill says...

Hi Mike:

I don't know where the question is in your post.

However, I think I'm seeing PVC pipe in your photo, and man, you don't want to use that with compressed air. You could do yourself or someone nearby serious damage.

Bill






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Air to series of valves

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Jul 19, 2010
 What valve and trigger devise?
by: Mike

Thanks Bill,

The picture shown is not the working model, I am aware of PVC under pressure.

The question is what type of valve to use and how to set up the control air release, triggering and closing one valve at a time, using a 12 volt system or a better idea that will improve function.

The idea is to release compressed air one port at a time, then move on to the next port. Reset can be done by the operator at the end of the sequence.

Current design has 12 outlet ports attached to a rotary, when activated release gas as the wheel turns. Several problems exist, the motor and rotary are to heavy, the rotary is not as precise as needed.

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You can get a miniature PLC for $200 or so, that will allow you to program in the firing sequence for your valves.

The solenoids for the valves, particularly if they are large valves, will draw more power than the PLC can provide, so you either use relays to allow the PLC to toggle the relay and power valves, or you use the PLC to actuate small 12 VDC valves, and allow the air flow through them to control the shifting of the big valves with air.

www.rantro.com is a company that specializes in control panels.

You don't indicate what size of valve or flow (or if you did I forget). If it's large flow you need suddenly, google dust collector valves, which are
pulsing large volumes of air into filter bags for particulate removal.

Cheers,

Bill

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