can some one give me designs for some homemade valves

[666lucky693]

i want to make a pretty powerful pneumatic and i want to make a valve because i hate using ball valves and i need some designs to show me how to make a good valve capable of holding 140psi or more cause i want to make whatever i shoot go really really fast this is my current setup of a gun it is pretty ghetto but all the parts were in my house so i built it here is the link to it http://www.spudfiles.com/forums/my-new- ... t9167.html so give me some ideas please

[Flying_Salt]

Piston Valves

If you think those are over your head, then look at modding a sprinkler valve

I personally would start out with the sprinkler, because they're easier than pistons.

[666lucky693]

is there any other types of valves i should know about before i go and make a piston cause i think i got the idea of it

[goathunter]

If you want to run the gun at 140 psi and this is your first time building a valve,go for a modified sprinkler. Once you get your feet wet on that then look into a coaxial and later a piston valve.If you screw up on the piston valve and pressurize it to 140 psi. there is a pretty good chance you'll have a back cap fly off(kaboom!).Start off with a modified sprinkler and work yourself up.
Nothing is better than starting off right and having all your digits so you can build the more advanced stuff.

[666lucky693]

where could i get a sprinkler valve and could it hold that much pressure cause i made a pneumatic with a small ball valve and a small bottle and it held 140 but i thought i heard spinkler valves cant hold as much as i want to use

[sjog]

<img src="http://i116.photobucket.com/albums/o12/ ... G_0097.jpg" border="0">
QEV--quick exaust valve
Air tank top of pic
Barrel threads on left
Gauge, blow valve/trigger,air fill. on right- top to bottom
Air tank is 4x36"
Shoots GB"s 400 yds.<img src="http://i116.photobucket.com/albums/o12/ ... mage-3.jpg" border="0"> Kids stuff! lol

[hi]

just start with a coaxial, they are VERY simple. if you can build a ball valve pneumtic, you can build a coaxial.

my only advice is that you have a very good bumper. also, if you cant find a piston and dont have a lathe, mold it with hot glue or epoxy.

ps- a piston valve that is built into a tee is just a very small coaxial.

[666lucky693]

how does that work cause i have no idea what i am looking at

[sjog]

Diaphram, a lot like sprinkler, fill on one side purge on the other to open valve. As in Quick exaust.

[666lucky693]

o ok i think i under stand what u mean

[Fnord]

See the wiki button on the top? everything you need to know is there.
http://www.spudfiles.com/spud_wiki/inde ... aust_valve


Edit: v Muhahahahah v

[goathunter]

Here you go:
http://www.spudfiles.com/spud_wiki/inde ... aust_valve
Oh and sprinkler valves can go to 150 psi.I regularly run mine at 145 psi.

Edit: Curse you Fnord!CURSE YOU! beating me to the links.

[666lucky693]

now i completly understand what it is so where can u get them at

[goathunter]

http://www.mcmaster.com/

[666lucky693]

well thanks for all the help every one i think i am gonna go with making a piston coaxial it seems to be easier to me now that i know how it works thanks 8)