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Safety thought for sprinkler valves

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Safety thought for sprinkler valves

Unread postAuthor: covey12 » Thu Aug 27, 2009 9:24 pm

I was messing around with mine when i forgot something, these valves shut very fast and if you pull your blow valve pilot and release it quick, there still may be pressure left, mine keeps enough to hurt someone with the marble if it went of while loading

so noobs make sure you hold the pilot open so all the air comes out, and more powerful shots too
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Unread postAuthor: dewey-1 » Fri Aug 28, 2009 7:57 am

Maybe you should have read this posting:

jhalek90 wrote:Looks very very good.

My only suggestion, all Pneumatic PVC guns NEED pressure gauge. for safety. I've show my cannon a few times just to have 10-15 psi of "left over" pressure.... stick a new piece of ammo in.... and accidentally fire...

So, over all Great looking gun. You juts need a gauge!


source: http://www.spudfiles.com/forums/marble-gun-t18891.html

Good words of advice!
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Unread postAuthor: inonickname » Fri Aug 28, 2009 8:31 am

noobs

Whatever you say mate.

If you choose to reduce the performance of your cannon by stopping venting the pilot volume early (ignoring repeaters) then that's your problem.

Come on man, common sense? Anyone who knows the characteristics of piston and diaphragm valves should know this.
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Unread postAuthor: covey12 » Fri Aug 28, 2009 1:42 pm

not everyone knows that though, there's people who just start this stuff and most likely don't even no how the valves work i wast trying to help
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Unread postAuthor: jimmy101 » Fri Aug 28, 2009 4:44 pm

Covey12:

Don't let the cranky people get to you. It's a good suggestion.

inonickname wrote:If you choose to reduce the performance of your cannon by stopping venting the pilot volume early (ignoring repeaters) then that's your problem.

Depends entirely on the design of the valve and gun.

To cycle the valve the pilot pressure must be less than the chamber pressure. Once the ammo has left the barrel there is really no performance reason to keep the valve open. Most sprinkler valves will honk once the ammo has left the barrel. This has zero affect on the gun's performance. Covey12's comment that there may still be pressure in the chamber is reasonable. It has nothing necisarily to do with performance. It also doesn't necisarily have anything to do with a repeater. It has everything to do with the chamber pressure at ammo exit.
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Unread postAuthor: THUNDERLORD » Fri Aug 28, 2009 6:57 pm

There are other things that can go wrong safety wise anyhow.

If you always point it in a safe direction and always treat it as loaded...

How many times/ effin ways to say that...

I hope a mod deletes this or you get cancer dewd, (not really but...) :roll:
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