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Pneumatic Cannon Help!

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: nathanhd123 » Thu Jul 28, 2011 4:45 pm

Does anyone have any experience with buying modified sprinkler valves from the us and shipping them to UK. Is it expensive? Do they have any problems with doing it?
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Unread postAuthor: mattyzip77 » Thu Jul 28, 2011 7:45 pm

Gippeto wrote:
Mr.Tallahassee wrote:What was that about double posting matty? Don't anger the mods! :wink:


:lol:

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[/youtube]


And of course....


[youtube]http://www.youtube.com/watch?v=rX7wtNOkuHo[/youtube][/
i cant stop laughing, lolololol!!!
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Unread postAuthor: jsefcik » Thu Jul 28, 2011 10:25 pm

nathanhd123 wrote:How do you attach a sprinkler valve to pvc as they are usually metal aren't they?

Sorry for all the questions but this is my first pneumatic spud gun.


Yes, there are alot of guns with metal/ pvc connected to a sprinkler valves just look around.

My one air cannon has pvc and copper , check it out here

http://imageshack.us/g/651/dscf8211.jpg/
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Unread postAuthor: Technician1002 » Thu Jul 28, 2011 10:58 pm

Be sure to get a sprinkler valve with threaded ends, then put threaded adapters for your chamber and barrel. This way they can screw together and broken parts can be replaced.

All my recent cannons have screw on barrels. Even barrels that are way out of proper size can be screwed on and tested.
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Unread postAuthor: jsefcik » Thu Jul 28, 2011 11:19 pm

nathanhd123 wrote:Also is there any way of improving a ball valve as the sprinkler valves are a lot more expensive?


Dont understand what your asking?

Do you mean turn the ball valve into a sprinkler valve?
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Unread postAuthor: Gun Freak » Thu Jul 28, 2011 11:23 pm

Nathan you can spring load it
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Unread postAuthor: jsefcik » Fri Jul 29, 2011 12:19 am

jackssmirkingrevenge wrote:How cheap is cheap? One of our sponsors used to do a pretty good deal, probably plus postage it will be cheaper than buying locally in rip-off Britain ;)

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That guy isnt taking any orders right now
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 29, 2011 12:36 am

jsefcik wrote:
jackssmirkingrevenge wrote:One of our sponsors used to do a pretty good deal


That guy isnt taking any orders right now


... as MrC pointed out, hence my judicious use of the past tense ;)
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Unread postAuthor: Mr.Tallahassee » Fri Jul 29, 2011 1:13 am

jackssmirkingrevenge wrote:probably plus postage it will be cheaper than buying locally in rip-off Britain ;)

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What about that use of present tense as well? :laughing6:
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Unread postAuthor: Crna Legija » Fri Jul 29, 2011 1:28 am

jsefcik wrote:
nathanhd123 wrote:Also is there any way of improving a ball valve as the sprinkler valves are a lot more expensive?


Dont understand what your asking?

Do you mean turn the ball valve into a sprinkler valve?



looks like he is asking if there is a way of ''improving a ball valve'' because sprinkler valve are lots more expensive.

and yes you can try loosen up the ball greases it up good and use a spring to rip it open quick.
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 29, 2011 1:30 am

Mr.Tallahassee wrote:What about that use of present tense as well? :laughing6:


While the deal is no longer available, it can now and in the future be cheaper than other deals ;)
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Unread postAuthor: nathanhd123 » Fri Jul 29, 2011 9:00 am

Does threading parts together reduce the pressure that can be used and should I be doing anything to stop threaded parts leaking?
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Unread postAuthor: saefroch » Fri Jul 29, 2011 9:15 am

PTFE or teflon tape will stop leaks, threads won't reduce pressure ratings at the pressures you'll probably be using, they'd only become significant near 1,000psi (or so I was told).
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Unread postAuthor: nathanhd123 » Sat Jul 30, 2011 3:16 am

Is PVC-U the same as SCH80? The PVC-U I have is a dark grey with thick walls/
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 30, 2011 3:23 am

nathanhd123 wrote:Is PVC-U the same as SCH80?


The "schedule" is a US pipe size standard, nothing to do with material or pressure rating. If your pipe is rated for the pressure you want to use then you should be fine.
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