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Rubber shraders

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Rubber shraders

Unread postAuthor: M3NT4L » Sun Jul 23, 2006 4:55 pm

I am tryng to make a pneumatic canon and i asked a friend who is a mechanic to give me a schrader valve.... He gave me a schrader that is one of the ones used in common car tires and is made of full rubber. i am wondering if it will work for a canon of under 100 psi pressures.
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Unread postAuthor: Velocity » Sun Jul 23, 2006 5:16 pm

if installed properly, it will work fine. The problem is, it is very difficult to install perfectly. The NPT schrader valves are easy; tap a 1/4" hole, use three wraps of teflon tape, and screw it in.

For this schrader, is there a small ridge in rubber "bulb"? If there is, I am pretty sure that is the place where the schrader gets locked it

Good luck trying to fit it in perfectly...
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Unread postAuthor: mark.f » Sun Jul 23, 2006 7:20 pm

Simply drill a 1/2" hole through where a coupling or adapter overlaps your chamber pipe, then pull the valve stem through from the outside with pliers until it pops into place. The ridge will pop over the top of the hole. I coated the one on my first pneumatic with some epoxy to make sure it sealed.
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Unread postAuthor: Shrimphead » Mon Jul 24, 2006 10:35 am

You really go it to go through two layers? The one I have can't. They really aren't hard to install.
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Unread postAuthor: PVC Arsenal 17 » Mon Jul 24, 2006 10:49 am

You mean a schrader with rubber around the stem and and then a rubber bell shape at the bottom?

Those are great for cannons. Just make a hole in a cap and pull the valve through and it pops into place and makes a perfect seal.
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Unread postAuthor: M3NT4L » Mon Jul 24, 2006 12:33 pm

Yes bulb shaped bottom.thx for the info.
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Unread postAuthor: frankrede » Mon Jul 24, 2006 12:58 pm

I prefer these,they are way better<a href="http://photobucket.com" target="_blank"><img src="http://i30.photobucket.com/albums/c325/redensekjf/tirevalve.gif" border="0" alt="Photobucket - Video and Image Hosting"></a>
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Unread postAuthor: LucyInTheSky » Mon Jul 24, 2006 1:43 pm

I had a rubber one and took my cannon to 185psi.
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Unread postAuthor: M3NT4L » Mon Jul 24, 2006 10:25 pm

:D Thank's for the info. Ill post some pics of my cannon, it is unfinished tho.
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