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Cracking pressure ofa standard schrader???

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Cracking pressure ofa standard schrader???

Unread postAuthor: jeepkahn » Tue May 05, 2009 10:27 am

Anyone know it off the top of your head???

TIA
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Unread postAuthor: jrrdw » Tue May 05, 2009 10:30 am

I would think the seal and spring will fail before the housing cracked.
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Unread postAuthor: Carlman » Tue May 05, 2009 10:33 am

around 70psi mate
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Unread postAuthor: Biopyro » Tue May 05, 2009 10:34 am

70psi or thereabouts. Thee is a topic around discussing it, which I'm just looking for.
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Unread postAuthor: jeepkahn » Tue May 05, 2009 10:34 am

Thanks Carlman....
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Unread postAuthor: Ragnarok » Tue May 05, 2009 10:53 am

Biopyro wrote:There is a topic around discussing it, which I'm just looking for.

If I remember right, it's Don Gippeto that revealed that information.

I think this is the original source: http://www.spudfiles.com/forums/viewtop ... tml#159756
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Unread postAuthor: jook13 » Tue May 05, 2009 11:10 am

If you are worried about the cracking pressure, check into presta valves. cracking pressure of like 1 psi. I just got into messing with them and they are badass.
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Unread postAuthor: MRR » Tue May 05, 2009 2:07 pm

I'm asking myself what shraders you are talking about!?
I use shrader valves all the time with pressures past 150 psi and never had a failure.

Did I miss something?
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Unread postAuthor: jeepkahn » Tue May 05, 2009 2:16 pm

We're talking about how much pressure(psi) before the air pressure overcomes the spring pressure to allow air through the valve... NOT, how much pressure before they crack/break/selfdestruct....

normally cracking pressure is used to describe/quantify the pressure required to force air past a oneway/check valve....
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Unread postAuthor: MRR » Tue May 05, 2009 2:21 pm

Oh ok.

I was a little confused by jrrdw's comment.
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Unread postAuthor: jeepkahn » Tue May 05, 2009 2:29 pm

MRR wrote:Oh ok.

I was a little confused by jrrdw's comment.


So was I... LOL
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Unread postAuthor: inonickname » Tue May 05, 2009 8:22 pm

Yep, I've also found the average cracking pressure to be 70 psi, give or take a few. If you want no cracking pressure then get the cores with an external spring and cut it off. You will need backpressure for it to reseat though.
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