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chamber vs. barrel sealing piston valves

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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chamber vs. barrel sealing piston valves

Unread postAuthor: imforcedtodothis » Sat Jan 20, 2007 12:51 am

is on better than the other? im making a gun with a piston valve actuated by a QEV so im aiming for raw power.
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Unread postAuthor: Insomniac » Sat Jan 20, 2007 12:55 am

Barrel sealers are slightly faster, and don't need O-rings.
Chamber sealers need O-rings to work.
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Unread postAuthor: imforcedtodothis » Sat Jan 20, 2007 1:04 am

so is there an advantage to chamber sealers?
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Unread postAuthor: imforcedtodothis » Sat Jan 20, 2007 1:05 am

also, would i be better off using a piston valve actuated by the QEV or should i just use the QEV on it own?
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Unread postAuthor: Insomniac » Sat Jan 20, 2007 1:10 am

1. Don't double post

2. Barrel sealers have an advantage, easier to build and they open quicker than chamber sealers.

3. Weather the QEV would be better depends on the size of the QEV, the size of the piston valve, and the quality of the piston valve.
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Unread postAuthor: mark.f » Sat Jan 20, 2007 8:43 am

In a model environment, (piston seals in carriage, equalization is controlled with a check valve, etc.), barrel sealers open quicker AND can use a larger sealing face and still have the piston start to move after a larger drop in pilot pressure.
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