SpudFiles

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.

I have taken a 3/4 inch qev and a chepo depot blow gun to 300 psi with no problems.

I was thinking about using a Mcmaster Blowgun
and one of these qevs:




or

If you are ordering the blowgun from mcmasters, than I suggest you get your qev from them as well. They are a few bucks more, but in my opinion a much better valve. However, if you must go with one that you listed, I would go with the first one..

Look here:::



http://www.mcmaster.com/#exhaust-control-valves/=hkw5io

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.

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.

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.

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.

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

So what pressure do you think a cheap black square style QEV could be taken up too?

I have used 600psi without problems.

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?

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.

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

Why do people always try to give their cannons oral??? Seriously wtf is wrong with people????