Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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sagthegreat
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Thu May 17, 2012 7:31 pm
I am on a limited budget for my first major project to be posted on the fourms, my budget is $25 for the 1/2 inch QEV and the blowgun
Concerns:
How much pressure do the cheap ebay QEV's take?
What about the pressure on the cheapo blowguns.
**im planning to go to 250-300 PSI**
As usual thanks a lot guys for the support throughout the planning of my project.

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mattyzip77
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Thu May 17, 2012 7:33 pm
I have taken a 3/4 inch qev and a chepo depot blow gun to 300 psi with no problems.
Go Bruins!!!!
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sagthegreat
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Thu May 17, 2012 7:36 pm
I was thinking about using a Mcmaster Blowgun
and one of these qevs:
or
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Lockednloaded
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Thu May 17, 2012 7:46 pm
If you're buying the eBay QEV (which I reccomend over any other valve of that size) you should also think about ordering a cheap slide valve to give you the option of semi automatic fire in the future. About the same price as a blowgun, with an extra feature.
I love lamp
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jackssmirkingrevenge
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Thu May 17, 2012 10:03 pm
Lockednloaded wrote:If you're buying the eBay QEV (which I reccomend over any other valve of that size) you should also think about ordering a cheap slide valve to give you the option of semi automatic fire in the future.
Unsurprisingly, I concur. Though I don't know if eBay slide valves can take 300 psi without leaking, unless you go for the paintball ones.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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jhalek90
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Fri May 18, 2012 12:39 pm
Unsurprisingly, I concur. Though I don't know if eBay slide valves can take 300 psi without leaking, unless you go for the paintball ones.
Not in my experience. I have used one at 200psi, and it developed a small leak. Also starts to get very hard to actuate at anything over 150 psi.
no experience with the paintball type.
jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?
POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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wyz2285
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Fri May 18, 2012 1:29 pm
Have taken my slide valve plus QEV (both from ebay and are the cheapest I could found) to 500 psi, without problems.
Slide valve does give you semi-auto, but remember, they aren´t as confortable to use as a blowgun.
CpTn_lAw wrote:

"yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? "
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sagthegreat
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Fri May 18, 2012 4:21 pm
i know how to make the blowgun sem auto, thanks to wyz2285
his idea of semi auto should be used more often, soo simple yet efficiant
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sagthegreat
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Fri Jun 08, 2012 2:42 pm
So what pressure do you think a cheap black square style QEV could be taken up too?
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wyz2285
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Fri Jun 08, 2012 3:01 pm
I have used 600psi without problems.
CpTn_lAw wrote:

"yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? "
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sagthegreat
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Sun Jun 17, 2012 12:45 pm
so if i use the semi auto method such as this, which is a screw in the blowgun to regulate how long it pilots for, will i need a bleed hole in the piston?
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Goats spudz
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Sun Jun 17, 2012 4:10 pm
I had a cheap ebay 1/4" Qev and 1/4" Slide valve that i took to 1000 Psi and managed to fire it without problems apart from the occasional leak, they work fine under 700 Psi.
Where's my Chuck key?
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sagthegreat
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Mon Jun 18, 2012 5:19 pm
I finally got my qev! gun will be posted soon.
Some concerns: for multishot will i need a bleed hole, also when i blow into the pilot hole, air doesn't come out of the chamber hole? My qev wont even come apart(believe me i tried). thanks guys for the help
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mattyzip77
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Mon Jun 18, 2012 5:32 pm
Why do people always try to give their cannons oral??? Seriously wtf is wrong with people????
Go Bruins!!!!