Shrader Valves

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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crazyfreak0075
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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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frankrede
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Sun Feb 25, 2007 3:32 pm

I prefer threaded, but both work fine.
Current project: Afghanistan deployment
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dippydodo03
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Sun Feb 25, 2007 3:44 pm

Threaded are the best because if they aren't they will blow out.
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PVC Arsenal 17
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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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frankrede
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Sun Feb 25, 2007 5:22 pm

well I under normal pressures those pop in schraders shouldn't blow out
Current project: Afghanistan deployment
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dippydodo03
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Sun Feb 25, 2007 5:44 pm

Hey, I'm just going off personal experiance, not trying to start anything.
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Hotwired
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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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trae08
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Sun Feb 25, 2007 5:52 pm

i prefer threaded ones to...
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noname
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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.
SpudBlaster15
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experament-u2
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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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trae08
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Sun Feb 25, 2007 7:18 pm

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

lol!!!!!!!!!!!!!!!!!!!!!
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c19o
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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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