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Piston valve fill valve location

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 valve fill valve location

Unread postAuthor: Bluetooth » Sat Dec 09, 2006 11:59 am

In my pneumatic piston valve canon that is curently being built there is a spring behing the piston that keeps it sealed very well can i pump it from the end of the chamber?
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Unread postAuthor: Hayseed_Andrew » Sat Dec 09, 2006 12:08 pm

I'd say you could fill it from wherever you feel like it.
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Unread postAuthor: Slugfoot » Sat Dec 09, 2006 3:06 pm

I have an over and under copper pneumatic that has a spring behind the piston which I fill from the muzzle end of the chamber with no problem whatsoever.
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Unread postAuthor: noname » Sat Dec 09, 2006 3:22 pm

If your piston is sealed with O-rings, you will need an equilization hole, but other than that you can fill from anywhere.
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Unread postAuthor: SpudStuff » Sat Dec 09, 2006 3:53 pm

You "can" but not with a fast fill rate. If the piston equilizes slower than the fill rate it will be theortically pushed backwards.
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Unread postAuthor: Bluetooth » Sat Dec 09, 2006 4:41 pm

Well im pumping it with a bike pump anyway so i dont think that matters and i already glued it and will be submiting it tomarrow.
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