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Solenoid valve electronic Vs. pneumatic comparison?

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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Solenoid valve electronic Vs. pneumatic comparison?

Unread postAuthor: Deactivated 1 » Thu Oct 05, 2006 11:19 am

I know, pneumatic allows for a much faster air discharge. I was hoping someone could provide some numbers so I can have an idea of exactly what sort of performance to expect. I have a solenoid operated valve, but after seeing my friend's gun in action, I am tempted to replace that valve for a new one (since the valve I have is cracked in one screw mounting post) and modify the valve for pneumatic actuation.

Any numbers on before/after modding muzzle velocity or anything like that would be appreciated.

Thanks.
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Unread postAuthor: zeigs spud » Thu Oct 05, 2006 2:39 pm

i don't think you will get much of an answer. i think it depends on the size of he valve,the psi, and the volume of the compression chamber.
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Unread postAuthor: COD_FILLETS » Thu Oct 05, 2006 4:41 pm

The pnumatic(ball valve) and electronic (Im guessing sprinkler/inline valve) do the same thing. They both let air out from a pnumatic tank.
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Unread postAuthor: Gnobbes » Thu Oct 05, 2006 4:56 pm

I don't have any concrete numbers for you, as I don't really get very technical about measuring performance after completing a cannon.
I just start blastin' stuff.
However, I can tell you that there will be a noticable difference if you trade the switch for a pilot valve.
I'd say I saw, roughly, about a 20%-25% increase in distance and damage between my old solenoid activated cannon and my newer pnu with a modded valve. There were other variables, of course, but like I said, I don't get too scientific about it.
Personally, I think it's worth it to mod.
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Unread postAuthor: frankrede » Thu Oct 05, 2006 5:37 pm

COD_FILLETS wrote:The pnumatic(ball valve) and electronic (Im guessing sprinkler/inline valve) do the same thing. They both let air out from a pnumatic tank.
Pneumatic? That dosnt mean ball valve. He means a sprinkler valve that has been modded for pneumatic operation.
He knows what they do but he want to know which performs better.
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Unread postAuthor: rna_duelers » Thu Oct 05, 2006 6:28 pm

I'd have to see i saw about a 100%increase in distance and also in the noise it made,from a woosh to a crack its a definite modd.
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Unread postAuthor: COD_FILLETS » Thu Oct 05, 2006 8:32 pm

frankrede wrote:Pneumatic? That dosnt mean ball valve. He means a sprinkler valve that has been modded for pneumatic operation.
He knows what they do but he want to know which performs better.


When he said "Pnumatic" i assumed the standard ball valve. My fault :D
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Unread postAuthor: frankrede » Thu Oct 05, 2006 11:13 pm

Its ok.
You are forgiven.
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Unread postAuthor: Deactivated 1 » Thu Oct 05, 2006 11:40 pm

Okay, thanks for the comments. Just to make it clear I was not talking about ball valves, only modded/unmodded sprinkler valves. I'll keep an eye out for decent valves to mod.
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Unread postAuthor: tntlly » Fri Oct 06, 2006 3:33 am

the mod isn't even hard, just drill a hole in the top, but a blow gun in it, and fill the solenoid hole with glue and you also have yourself a cool handle with a trigger
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Unread postAuthor: MrCrowley » Fri Oct 06, 2006 4:03 am

he wasnt asking how to mod he was asking whats the performance increase/advantage of modding.
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Unread postAuthor: boilingleadbath » Fri Oct 06, 2006 2:14 pm

I would suggest downloading the GGDT (check the spudwiki) and comparing preformance... if I knew what the vent diameter of the stock solenoid valve.

I think I heard .04" somewhere. Is this credible?
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Unread postAuthor: rna_duelers » Sat Oct 07, 2006 6:09 am

The venting diamter of my valve(pre mod)was about 2mm.I might whip out the old ruler tomorow and measure it.
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Unread postAuthor: Deactivated 1 » Fri Oct 13, 2006 1:26 am

I just thought I'd let you all know that I went and bought a new solenoid valve, two barbs, some compressor hose (rated to 233psi), ball valve and hose clamps.

Originally I couldn't operate my gun past about 200 pumps (I think that's around 60psi, calculated from when I borrowed a pressure gague. My pump is really tiny.) however with pneumatic modification I pumped it up to 300 pumps. I bought the new valve because the old one was damaged.

Old firing speed: 170Km/h
New firing speed: 287Km/h

So there you have it. Pretty good, I think. Now all I need is a decent pump. Any suggestions? I'm in Perth, Western Australia. I want something that will last, with a pressure gague preferably rated up to 200psi.
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Unread postAuthor: rna_duelers » Fri Oct 13, 2006 2:43 am

Saw in Big W the other day a 12volt compressor for about $15 at it goes to 250psi i was told about these before but i could never find them before but they are in the car section wiht oils and such.But if this is a standard PVC sprinkler valve i wouldnt take it to 200psi keep it at about 140psi max.
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