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blow gun question

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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blow gun question

Unread postAuthor: JDAX23 » Wed Jan 09, 2008 10:56 pm

yesterday i purchased an orbit sprinkler valve as well as a blow gun.
i know i need to drill a 1/2 inch whole in the middle of the valve, but my question is if i want to mount the blow gun directly to the valve for better performance, all i have to do is just use an adapter correct? with some teflon tape? and then it will work?

thanks
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Unread postAuthor: BigJon » Wed Jan 09, 2008 10:58 pm

Yes thats how it works but for 1/4" threads I believe it's a 7/16" hole but whatever.
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Unread postAuthor: elitesniper » Wed Jan 09, 2008 11:00 pm

1/2 inch? i think you mean 1/4 inch and yeah try to get it in the middle. if you want an inline the your put the blow gun in directly into the valve but if you want a little longer then just use two barbed fittings and tap it in the valve, yes always use teflon on threaded fittings for good seals
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Unread postAuthor: JDAX23 » Wed Jan 09, 2008 11:02 pm

alright thanks guys, but im pretty sure my blow gun is a 1/2 inch, the adapter that came with it is 1/2 inch and fits into it... so i was planning on screwing one side of the adapter into the blow gun, and the otherside into the valve
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Unread postAuthor: windshrike » Wed Jan 09, 2008 11:43 pm

There are no 1/2" blowguns that I know of..........
JDAX, I think you actually went and measured your fitting's diameter. This size of fitting is called 1/4" NPT(National Pipe Thread), and is, in actuality, 1/2" wide. However, in order to tap the hole properly to minimize leaks, a 7/16" bit should be used.
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Unread postAuthor: MrCrowley » Wed Jan 09, 2008 11:46 pm

Hmm weird, most are 1/4". Never seen a 1/2" on a blow gun before.

Check it with the ones in the tutorials on the site.

Just drill a hole to your fitting size I guess.
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Unread postAuthor: JDAX23 » Wed Jan 09, 2008 11:46 pm

haha ahh there you go lol thank you kind sir much appreciated... im a retard
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Unread postAuthor: LikimysCrotchus5 » Thu Jan 10, 2008 12:02 am

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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: jimmy101 » Thu Jan 10, 2008 11:55 am

Elitesniper (and others) are correct, the size hole you need to drill has very little to do with the nominal dimension of the fitting.

Just a suggestion, but before you go drilling a hole in the essentially irreplacable valve body you should do a test installation on something like a piece of scrap PVC.

"measure once, cut once, swear for 15 minutes, make another trip to the hardware store ..."
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Unread postAuthor: LikimysCrotchus5 » Thu Jan 10, 2008 3:44 pm

"Measure once, cut twice" O sh*t i messed up my cannon :)

Dont want that happening now do we.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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