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piston probz

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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piston probz

Unread postAuthor: experament-u2 » Tue Apr 03, 2007 9:55 am

ok i know there are hundreds of posts like this but iv searched and cant find anything

but iv built my first piston valve and and it seals and holds pressure but wen i vent it (through blowgun) the piston it doesn't pull back right up until the end of the pressure and it only lets a tiny tiny bit out

plz can anyboby help me
oh and my chamber is 400mm of 25mm, barrel is a 500mm 6mm, and the piston housing is a 25mm T
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Unread postAuthor: LGM » Tue Apr 03, 2007 10:01 am

Just get a bigger pilot valve.
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Unread postAuthor: experament-u2 » Tue Apr 03, 2007 10:06 am

i need to keep the pilot valve 1/4 because of a desgin im making and the blow gun is a major part
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Unread postAuthor: LGM » Tue Apr 03, 2007 10:09 am

Then use a .25" ball valve, a blowgun won't do it.
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Unread postAuthor: chaos » Tue Apr 03, 2007 10:28 am

a blowgun will do it i have proved that.

its will end up being the pilot volume and the seal between the pilot volume and chamber/barrel seal.
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Unread postAuthor: joannaardway » Tue Apr 03, 2007 11:35 am

Naah. Electrical tape would work much better than duct tape for those purposes. (referring to the picture)

Or you could try modding your blowgun.
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Unread postAuthor: zeigs spud » Tue Apr 03, 2007 11:55 am

chaos wrote:a blowgun will do it i have proved that.

its will end up being the pilot volume and the seal between the pilot volume and chamber/barrel seal.


i wouldn't use duck tape seeing as it can stick to the pvc somtimes.
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Unread postAuthor: chaos » Tue Apr 03, 2007 8:55 pm

ok thnx i suppose it would be better with electricle tape.

i only used it in the pic coz that is what he has been using.
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