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Secondary Piston Valve

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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Secondary Piston Valve

Unread postAuthor: dave1 » Sun Jan 20, 2008 5:02 pm

God help me, but this is a discussion forum and hopefully I can ask a question here. If not then I won't bother anyone anymore. Has anyone ever tried to make a secondary piston valve to dump the main piston valve, and if so, what are your suggestions? Thanks.
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Unread postAuthor: psycix » Sun Jan 20, 2008 5:11 pm

Yes, they do exist and are good pilot valves for large piston valves.
Im too lazy to search one up for you, but there are some of these around and by searching for them you can make yourself fammiliar with the search button.
Wich also prevents useless questions but thats another thing......

But yes, they do exist and I've even got plans for building such a thing.
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Unread postAuthor: c19o » Sun Jan 20, 2008 5:30 pm

Yes I've did it. Using a 1/2" porting valve to pilot my 1.5" porting valve. It worked great and could be piloted with a blowgun.
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Unread postAuthor: ALIHISGREAT » Sun Jan 20, 2008 5:33 pm

look up Ragnarok's HEAL cannon, it uses a QEV (basically a piston valve) to pilot the main piston.
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Unread postAuthor: SpudMonster » Mon Jan 21, 2008 2:45 am

ALIHISGREAT wrote:look up Ragnarok's HEAL cannon, it uses a QEV (basically a piston valve) to pilot the main piston.


QEVs are NOT Piston valves. They are specially designed diaphragm valves.
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Unread postAuthor: ALIHISGREAT » Mon Jan 21, 2008 2:51 am

SpudMonster wrote:
ALIHISGREAT wrote:look up Ragnarok's HEAL cannon, it uses a QEV (basically a piston valve) to pilot the main piston.


QEVs are NOT Piston valves. They are specially designed diaphragm valves.


...not again :roll: yes they are (well the ones we have in the uk) look at the one on HEAL it is compleltly different to your american QEVs
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 21, 2008 2:56 am

ALIHISGREAT wrote:...not again :roll: yes they are (well the ones we have in the uk) look at the one on HEAL it is compleltly different to your american QEVs


sort of
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Unread postAuthor: frankrede » Mon Jan 21, 2008 3:04 am

SpudMonster wrote:
ALIHISGREAT wrote:look up Ragnarok's HEAL cannon, it uses a QEV (basically a piston valve) to pilot the main piston.


QEVs are NOT Piston valves. They are specially designed diaphragm valves.
I have seen QEV's with pistons.
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