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altearnative sealing faces?

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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altearnative sealing faces?

Unread postAuthor: mopherman » Sun May 20, 2007 4:43 pm

id there anyhing els besides neoprene that seels well? i have already looked at HD. thanks
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Unread postAuthor: iPaintball » Sun May 20, 2007 5:04 pm

Some auto shops sell gasket sheet for making custom gaskets, It seals perfectly, if you can find some...
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Unread postAuthor: Intel Xeon » Sun May 20, 2007 5:31 pm

Well, lowes has 1/8 and 1/16 gasket sheet in the sanitary plumbing section
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Unread postAuthor: hi » Sun May 20, 2007 6:33 pm

use ABS rubber end caps, those work well, they are called "QWIK CAPS", all hardware stores that have ABS will have them. i like them for larger barrels. they are about 1/4'' thick rubber.

also for 1'' barrel and under, inner tube tires from bikes work well.
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Unread postAuthor: Pete Zaria » Sun May 20, 2007 6:42 pm

A friend of mine cut a disk from an old wetsuit or drysuit (not sure which) for the sealing surface of a coaxial piston. It's lasted a long time...

Just my two cents.

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Pete Zaria.
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Unread postAuthor: Panzerfaust » Sun May 20, 2007 7:15 pm

I used a rubber washer from lowes, they come in sizes that go all the way to 2" and mine sealed perfectly. i have also heard that mousepads will work well.
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Unread postAuthor: boilingleadbath » Sun May 20, 2007 7:16 pm

Neigh anything works to a degree; see, for instance, the wide array of things O-rings are made out of - neoprene to nitrile to viton to Teflon to silicone rubber to whatever.

In addition, consider all the materials that have been used historically... like leather.

My point is that static compression seals are pretty forgiving, and that basically any non-porous material with even a slight amount of 'give' to it will work (although harder substances require harder tighter tolerances)
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Unread postAuthor: noname » Sun May 20, 2007 8:40 pm

You can usually get sheet rubber in various thicknesses, I use it for diaphragms, piston sealing faces, and the thin stuff for high pressure burst discs.
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Unread postAuthor: Scope » Sun May 20, 2007 8:45 pm

teflon, silicone, rubber, nylon.
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Unread postAuthor: Modderxtrordanare » Sun May 20, 2007 9:18 pm

If your in a cinch, and low on cash, try lopping off a bit of a rubber mallet?
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Unread postAuthor: mopherman » Mon May 21, 2007 7:54 pm

found perfect piston. rubber cork wrapped in tape :D im happy now
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