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Another valve help topic, xD

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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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 8:25 pm

Soda bottle? The 2liter kind
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Unread postAuthor: saefroch » Sat Jan 29, 2011 8:41 pm

Very easy to damage (if it is damaged, just don't use it at all), not to be taken past 140psi, and will almost always burst past 180psi. Still not a very good pressure vessel, but workable.

You can't buy threaded metal pipe fittings?
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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 8:47 pm

I'm 15 (in a month), with no job, I'm making ghetto guns, so no, I cannot get that. My dad usually supports me financially, but he doesn't like it if I make dangerous things xD, oh and by the way...http://www.spudfiles.com/forums/viewtopic,p,309305.html#309305 TADA
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Unread postAuthor: saefroch » Sat Jan 29, 2011 9:31 pm

Using pressure-rated metal threaded fittings is a LOT less dangerous than using plastic bottles. It's nigh on impossible to rupture sch40 steel fitting with pressure supplied by bike pump alone. The shrapnel from plastic containers, at least at close range, is very dangerous.

If you really can't pay a few dollars for some pressure-rated parts at least get something with a gauge so you know when you're pushing it. Ghetto builds can be fun and interesting, but not if you're in constant danger of it exploding because you have no idea how close it is to bursting.

End of safety lecture. No more on that from me.
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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 9:41 pm

Link me to a trusted vendor that sells these sch40 parts please
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Unread postAuthor: saefroch » Sat Jan 29, 2011 10:09 pm

http://www.mcmaster.com/

Or almost ANY other seller of plumbing products. You should be able to find some locally, they're a pretty standard building material. Where you live they may not be called such, if they're in metric or identified by some other system.
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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 10:20 pm

Where would the sch40 stuff fall into?(category wise)
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Unread postAuthor: saefroch » Sat Jan 29, 2011 10:33 pm

Pipe fittings and pipe. Then just browse.
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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 10:54 pm

Yea..theres a lot..wait, so I'm gonna make my air tank..outta steel pipes?AWESOME
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Unread postAuthor: saefroch » Sat Jan 29, 2011 10:56 pm

That's the idea... just look around the showcase. Almost everything is either pressure-rated PVC or some sort of metal.
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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 11:10 pm

Sweet, I'm making a compact pistol next, this one with a blow gun trigger, it'll truly be a semi automatic, it'll fire 6mm BB's, you know, the works xD

Or a semi auto sniper rifle....or a bolt action sniper rifle..something that'll waste my time basically xD
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Unread postAuthor: saefroch » Sat Jan 29, 2011 11:34 pm

You are currently experiencing a McMaster high- the belief that you can build anything now that you have access to all sorts of pipe fittings you never even knew about before. Don't worry, it'll pass.
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Unread postAuthor: nadjatee1996 » Sat Jan 29, 2011 11:56 pm

No..I had ideas to build those things some time ago, the Mcmaster stuff will make it easy now, as I was wondering how to make a air tank small and portable, soda bottles aren't exactly very portable ya know. I also needed new materials anyways, the crap I buy at the store near my house?Not pressure rated, dirty as hell and generally not trusted. As a first, the stuff I bought will work. But I know at least what will work and what won't know (such as duster bottles...) and I also need a damn job...

Also, I can build anything, as long as technology allows it and I'll be financially, mentally, physically, emotionally, sexually and socially stable after I finish it. (<- this was a joke by the way..can't really show it through text...)
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Unread postAuthor: Fnord » Mon Jan 31, 2011 6:59 pm

By the way, if you have any decent hardware stores locally you'll be able to buy stuff 2" and under much cheaper than mcmaster sells it. Even home depot sells stuff like this.
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Unread postAuthor: nadjatee1996 » Mon Jan 31, 2011 9:47 pm

Seeing as I don't own a car, or have a job, I think asking my parents to pay with their credit card and then paying with my allowance cash is easier than asking my dad to drive me to Home Depot to pick some stuff up. As I am still an amateur, I'll have to make several trips as I'm bound to make mistakes, so I must say, McMaster is the better option. Also I bought a 2 liter bottle of Ginger Ale, as soon as its finished, it'll have a new purpose
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