Sprinkler system valve as a pneumatics quick Release valve

[eaglecat]

As an engieneer of heavy machinery, we often use solenoid actuators. Specifically they are located in the pilot hydraulic valves that actuate the main hydraulic valves on our wheel loaders. (Electro-hydraulic designs.)

We have at times tested these on the bench. They get very warm if accidentally left on at full current. To say the least. They are large electro magnets. Will easily melt nearby electronics and burn tiny hands.

Electronic solenoids are EXPLICITLY banned. Given my above experiences, i posit this is due to safety.

Well, banned except for the itsy bitsy tiny 20 wind thing in the Festo.

You have many options, other than that for your design. Pilot pneumatic (though I have not seen it done) is amongst them. Actually would be quite ingenious. HOWEVER please read the rules, it gains you nothing, as the largest tubing you can use and only tubing size you are allowed to use (from what I read there and am told) for pneumatics is the small stuff in the KoP. Just different colors allowed.

But, in short, in searching the FESTO site, they have a "quick release version"... probably (my guess) is they use a finer wire lower O2 wire with 2x the windings to make a more powerful magnet in the same size... maybe neodenium instead of cobalt... same "juice up" linearly used radially in low versus high end model plane motors. (my inspiration for engineering) however, see my post about air resistance. I will be over the next few days finishing one about kicker design. It isn't all about fast. It is a lot about mass. Consider trying to add a lever to your pneumatic design, or looking at the "foot" mass... too high (hard to accelerate) or too low (much less than ball mass)? It is an Inelastic Collision with a CoR of about 60%... give or take, for the lower 0.62 bar inflation compared to FIFA testing at 0.8 bar.

- John (eaglecat)

[Vikesrock]

Originally Posted by eaglecat

Well, banned except for the itsy bitsy tiny 20 wind thing in the Festo.

Once again, the Festo kit valve is NOT the only allowable pneumatic solenoid valve. Please stop posting this to avoid confusing people.

For example this SMC valve is legal:
http://www.coastpneumatics.net/displ...QZ2121-6LO-N7T

This MAC valve is also legal:
http://www.macvalves.com/products/Th...mall/36/36.htm

I'm sure there are MANY, MANY others that meet the specs required by the manual as well.

The distinction is fine, but important for those looking for additional parts.

[ayeckley]

Originally Posted by eaglecat

Electronic solenoids are EXPLICITLY banned. Given my above experiences, i posit this is due to safety.

Electric solenoid *actuators* are prohibited, but electro-pneumatic solenoid valves are not. This seems to be the misunderstanding.

[fsgond]

Without going into the rules, I have used the valves for 120 PSI air and they work fine. the main problem that you would run into is that the system usually run on 48V AC.

Just FYI

[Tank2010]

Originally Posted by ayeckley

Electric solenoid *actuators* are prohibited, but electro-pneumatic solenoid valves are not. This seems to be the misunderstanding.

Originally Posted by Vikesrock

Once again, the Festo kit valve is NOT the only allowable pneumatic solenoid valve. Please stop posting this to avoid confusing people.

For example this SMC valve is legal:
http://www.coastpneumatics.net/displ...QZ2121-6LO-N7T

This MAC valve is also legal:
http://www.macvalves.com/products/Th...mall/36/36.htm

I'm sure there are MANY, MANY others that meet the specs required by the manual as well.

The distinction is fine, but important for those looking for additional parts.

Ya sorry every one It was a crazy thought that poped into my head thanx for all the good Ideas that are legal. We werent sure what was out there and couldn't seem to find what we were looking for thats what brought us to post the question here. Thanx to those who gave me a kick in the pants for even thinking about useing the Sprinkler system valve and not even trying to help.