valve choice for pneumatic

[pat123]

This is the first pneumatic that i have built. i have the gun ready I just have to find a valve. I have a 2 inch by 2 ft chamber and a 1/2in barrel. it is made out of PVC. I was wondering what kind of valve would work well and is cheap.

[spud yeti]

Make a piston valve!
Heres how to: http://www.spudfiles.com/spud_wiki/inde ... ston_valve
If youre not that ambitious why not use a modded sprinkler valve. here how to http://www.spudfiles.com/forums/viewtop ... a20db28832
Or else just look under the wiki (top right corner of your page) for the other valves

[pat123]

thanks
I was thinking about a sprinkler valve but i might make a piston

[Modderxtrordanare]

Make a Burst Disk valve.

[iPaintball]

Your gun sounds exactly like my first gun! It had the same size chamber and the same bore. My barrel was 5 feet long and I used a modded 3/4" sprinkler valve. It would shoor metal marbles through 3/4" plywood like it was cake. You should make a piston valve for it to increase performance though.

[lukemc]

Triggerd burst disk!! my ghetto verion of it was impressive. http://www.spudfiles.com/spud_wiki/inde ... burst_disk

[Jumpin Jehosaphat]

For a 1/2" barrel a sprinkler valve is overkill. I would just go with a modded sprinkler valve or a smaller QEV.

[pat123]

thanks I am about to go to lowes to get a sprinkler valve. all i need is a sprinkler valve and blowgun right? will lawn genie valves work?

[Jumpin Jehosaphat]

It depends, you should get one without a guide rod,
If it looks like it could have a guide rod through the center of it, it probably does.
I personally used an Orbit WaterMaster.

You should also pick up some JB Weld or Epoxy so you can plug up the ports after you remove the solenoid.

Edit: You should also get a 1/4" NPT pipe tap and any sort of pipe nipple you will need to connect the blowgun to the valve.

[praetorian91]

Lowe's will have the Orbit Watermaster valves. Heres what you will need:

1. Orbit Watermaster Sprinkler valve (comes in 1" and 3/4")

2. Blowgun

3. Epoxy

4. Teflon tape

5. Connector piece (to connect blowgun to valve)

[Modderxtrordanare]

Make sure to open the box and look at the actual valve and not just the picture. It's what I do.

Orbit Watermaster ftw.

[pat123]

how will the valve fit onto the pvc is it threaded or should i just prime and glue it

[Modderxtrordanare]

how will the valve fit onto the pvc is it threaded or should i just prime and glue it

Personally, I would go with threaded ones, and when you thread the connections into it, make sure to liberally apply teflon tape/paste. Then if you make another cannon you can interchange the valve, and not have to buy a new one.


Then again, you can always get it in slip, and primer/glue it in, but then you can't re-use it. (easily)

[pat123]

does the valve have threads in it to fit a male adapter on the pvc

[praetorian91]

Depends on the one you choose. That means, choose one with female threads on each side, so you can fit a male adapter into it. Its truly not that hard.