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Shrader 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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Shrader Valves

Unread postAuthor: crazyfreak0075 » Sun Feb 25, 2007 3:25 pm

Hey guys im gonna build a pnumatic soon and i was noticing that the shrader valve in this topic http://www.spudfiles.com/forums/viewtopic.php?t=3573& is different than the shrader valve sold at www.mcmaster.com.

The one in the topic has a rubber end to it to keep it in and all the one that mcmaster has is a shrader valve with an NPT end to it. Are these too valves different is one safer than the other???
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Unread postAuthor: frankrede » Sun Feb 25, 2007 3:32 pm

I prefer threaded, but both work fine.
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Unread postAuthor: dippydodo03 » Sun Feb 25, 2007 3:44 pm

Threaded are the best because if they aren't they will blow out.
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Unread postAuthor: PVC Arsenal 17 » Sun Feb 25, 2007 5:18 pm

dippydodo03 wrote:Threaded are the best because if they aren't they will blow out.


Oh they will...
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Unread postAuthor: frankrede » Sun Feb 25, 2007 5:22 pm

well I under normal pressures those pop in schraders shouldn't blow out
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Unread postAuthor: dippydodo03 » Sun Feb 25, 2007 5:44 pm

Hey, I'm just going off personal experiance, not trying to start anything.
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Unread postAuthor: Hotwired » Sun Feb 25, 2007 5:52 pm

Mmmhmm...

I'm using a presta valve cut out of a bicycles inner tube at 200psi and its not going anywhere.

Its clamped in a 1/4" compression fitting with a steel washer though, not just slotted in a hole.
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Unread postAuthor: trae08 » Sun Feb 25, 2007 5:52 pm

i prefer threaded ones to...
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Unread postAuthor: noname » Sun Feb 25, 2007 6:08 pm

Threaded valves are easier to put in, just drill a 3/8" hole, put the valve itself into your drill chuck and screw it in.
Rubber pull through valves always seal, because the pressure holds the valve against the inside of the pipe. I have had them at over 180 psi with no blowouts. They're easier to get, because you can just go to a bike shop and ask for all the popped tires, which they usually give you for free. Cut out the valve and pull it through a hole with pliers.
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Unread postAuthor: SpudBlaster15 » Sun Feb 25, 2007 6:10 pm

Pop-in schrader valves will not blow out under normal operating pressures, though they will leak once the pressure in the chamber rises past ~60psi. Threaded schrader valves are easier to make leak proof.
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Unread postAuthor: experament-u2 » Sun Feb 25, 2007 6:58 pm

mine has never leaked and i take it past 60 every time i shoot

i would prefer to use a treaded one tho like they^ said can hold allot of pressure and can be made air tight easily
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Unread postAuthor: Hotwired » Sun Feb 25, 2007 7:10 pm

Your signature is freaking disturbing....
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Unread postAuthor: trae08 » Sun Feb 25, 2007 7:18 pm

the kid in his sig sat behind me in the 3rd grade =)
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Unread postAuthor: frankrede » Sun Feb 25, 2007 7:28 pm

lol!!!!!!!!!!!!!!!!!!!!!
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Unread postAuthor: c19o » Sun Feb 25, 2007 8:00 pm

i prefer threaded schrader valves because they are safer, and can handloe higher pressures.
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