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What low pressure regulator can I use?

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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Unread postAuthor: jackssmirkingrevenge » Tue Jul 10, 2012 12:08 am

Lockednloaded wrote:@JSR, that's what I was saying...


Yep, good example there :)
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Unread postAuthor: Wizard » Tue Jul 10, 2012 8:25 am

jackssmirkingrevenge wrote:Since you're using a paintball bottle, you might want to consider stronger construction for higher pressures, linked with a quick exhaust valve.

A 3/4" QEV can be purchased relatively cheaply from eBay. This has lower flow than a sprinkler valve, but very fast opening. You can use this in conjunction with a smaller higher pressure chamber to achieve required performance.

If you use a ninja paintball tank, you can adjust this to 450 psi without the need for an additional regulator, and this pressure coupled with a relatively tiny chamber and fast valve is more than enough to fire off a t-shirt. You will need stronger construction - PVC won't cut it at these pressures - but on the other hand, the launcher will be more compact.

GGDT will help with virtual modelling before you commit to build.


Well its a bit late as I already bought all the parts except the air tank, regulator and a pressure gauge for the top of the air chamber. And I have already assembled the chamber and barrel but I discovered my 1/2 drill bit was missing so I couldnt mod my sprinkler valve.

Also I was trying to figure out that GGDT thing but it wasnt working for me. Im sure it was user error tho lol.

While in town I stopped at a scuba shop and talked to the owner and his Air table has 3000 PSI going in and an inline internally adjustable regulator, that is shorter than a roll of pennies, brings it down to 110 working PSI. All connected with standard 1/4" fittings and braided hose.

So im trying to find something like that. I figure I can use a paintball drop down connector to connect the air tank to the gun and use that hose with 1/4" connectors to plug into that regulator that connects as my diagram shows.

Also the main reason for the HPA tank is for more shots on one tank than the CO2 I originally thought of.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 10, 2012 11:51 am

Have you considered using a slide valve as a pilot instead of a blowgun?

That way, you can hook the supply from your reg directly to it, effectively making your sprinkler valve semi-auto.
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Unread postAuthor: Wizard » Tue Jul 10, 2012 12:25 pm

jackssmirkingrevenge wrote:Have you considered using a slide valve as a pilot instead of a blowgun?

That way, you can hook the supply from your reg directly to it, effectively making your sprinkler valve semi-auto.


I have not thought about that even being possible. And sitting here thinking about it im not sure I understand how that would work.

My current idea is to use the standard threaded hose to connect the regulator to the fill valve and then the tank to the regulator but i cant figure out how to mount the ASA to the launcher without drilling more holes into the bottom of the air chamber.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 10, 2012 12:31 pm

Wizard wrote:I have not thought about that even being possible. And sitting here thinking about it im not sure I understand how that would work


Some explanation of how it workshere.

... and this is it working in practice:

[youtube]http://www.youtube.com/watch?v=YwiHi2oeABA[/youtube]
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Unread postAuthor: Wizard » Tue Jul 10, 2012 11:24 pm

jackssmirkingrevenge wrote:
Wizard wrote:I have not thought about that even being possible. And sitting here thinking about it im not sure I understand how that would work


Some explanation of how it workshere.

... and this is it working in practice:



Ah I got it now, I like the idea for something like a BB gun or the likes but I dont think it has enough volume to launch a shirt any good distance.

But I do see how I could use that set up with a real trigger and pistol grip with a hopper of BB's lol.

Im still trying to figure out those QEV valves but I cant find a 1" one and all my fittings are for 1" with the sprinkler valve I bought. I havent modded it yet because I like the idea of the QEV but are they really that much more efficient?
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Unread postAuthor: Crna Legija » Wed Jul 11, 2012 5:37 am

edit idk what happend hear
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Last edited by Crna Legija on Wed Jul 11, 2012 5:46 am, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 11, 2012 5:44 am

Wizard wrote:I dont think it has enough volume to launch a shirt any good distance.


If you put a reasonable amount of pressure and chamber volume behind it, it should have no problems :)

Im still trying to figure out those QEV valves but I cant find a 1" one and all my fittings are for 1" with the sprinkler valve I bought. I havent modded it yet because I like the idea of the QEV but are they really that much more efficient?


A QEV and sprinkler valve work on pretty much the same principle, the different is that a QEV tends to be made to a heavier duty specification. You should be OK with a sprinkler valve, but I would definitely consider a 3 way valve for filling/piloting.
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Unread postAuthor: Crna Legija » Wed Jul 11, 2012 5:45 am

Wizard wrote:because I like the idea of the QEV but are they really that much more efficient?


Not efficient but for a given size way more flow, you probably wont find a 1'' QEV and if you do it will be expensive but you can find dust collector valves witch a basically the same thing but have diaphragm instead of piston still very powerful.
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Unread postAuthor: Wizard » Wed Jul 11, 2012 11:00 am

Ok I think I am now understanding the concept now, but I dont think it would work for this application because I want to be able to control how much of that 100 PSI is being put into the tank.

For example I have a max distance of 150 feet to either side of me to the top far corners of the stands to launch shirts and anything further than that would put it past the stands. So lets say for easy math 100 psi will launch a shirt to exactly 150'.

If I used that semi auto method and always filled to 100 psi I would be able to get shirts to the ppl on the far ends of either side of me. But if I launched them straight in front of me the shirts would either fly over the heads of everyone and land in the parking lot or I would bean someones grandma in the face with a solid rolled shirt at full power.

So thats why I used the 2nd ball valve on the filling port to be able to shut the air off anywhere from 1-99 psi if I dont want full power for shorter launch distances.

I think I may play with the idea of a QEV in place of my sprinkler valve once I see how my current setup does. Im not sealing the threads going into the sprinkler valve with anything more than liquid teflon so that if something goes wrong with it I can replace it.

But I do have a new idea for the semi auto setup using a pony SCBA tank hehehe :D
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Unread postAuthor: Wizard » Sat Jul 14, 2012 9:36 am

Well I got the last of my parts in except the mounting ring from palmers just now this morning. So hopefully I can get it all set up and tested this weekend and just wait to mount the bottle to the gun till monday.
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Unread postAuthor: PVC Arsenal 17 » Tue Jul 17, 2012 10:27 pm

I didn't read any of the replies but I'm quite fond of the Palmer Pursuit Female Regulator. It'll hook right up to your paintball tank and give you two 1/8" NPT side outlets.
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Unread postAuthor: jackssmirkingrevenge » Tue Jul 17, 2012 11:54 pm

PVC Arsenal 17 wrote:Palmer Pursuit Female Regulator.


A female regulator is every man's dream :D
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Unread postAuthor: PVC Arsenal 17 » Wed Jul 18, 2012 12:06 am

jackssmirkingrevenge wrote:
PVC Arsenal 17 wrote:Palmer Pursuit Female Regulator.


A female regulator is every man's dream :D


Amen. :banghead:
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Unread postAuthor: sagthegreat » Wed Jul 18, 2012 7:27 am

Amen :shock:
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