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schrader valve cores

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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schrader valve cores

Unread postAuthor: jackssmirkingrevenge » Mon Dec 22, 2008 12:01 pm

These are the two variations of valve core I've encountered since I started playing with schraders, any other types out there?
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Unread postAuthor: ALIHISGREAT » Mon Dec 22, 2008 12:05 pm

i've only seen the right hand type... there can't be too many other variations... can there!?!?!?
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Unread postAuthor: jackssmirkingrevenge » Mon Dec 22, 2008 12:11 pm

No diea, that's why I'm asking. Reason being that the left type has an exposed spring and can therefore easily be modded to crack open at low psi.
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Unread postAuthor: ALIHISGREAT » Mon Dec 22, 2008 12:15 pm

jackssmirkingrevenge wrote:No diea, that's why I'm asking. Reason being that the left type has an exposed spring and can therefore easily be modded to crack open at low psi.


maybe just make your own core? it should be too hard, just a bit fiddly.

i just use check valves because they crack open at low pressures so i core my schraders.
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Unread postAuthor: Sticky_Tape » Mon Dec 22, 2008 12:36 pm

I see you got the pictures. Yeah I have olny seen the right one. Are they universal?
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Unread postAuthor: Gippeto » Mon Dec 22, 2008 1:00 pm

These are the only types I've ever seen in person.

Jack, where did you find that other one?
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Unread postAuthor: Davidvaini » Mon Dec 22, 2008 1:55 pm

Here is a picture of some that I picked up...

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Unread postAuthor: Sticky_Tape » Mon Dec 22, 2008 1:56 pm

We should make somthing called the house of shraders. That's a different one you have gippeto.
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Unread postAuthor: ALIHISGREAT » Mon Dec 22, 2008 2:05 pm

Nice collection you have there David :wink:
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Unread postAuthor: Gippeto » Mon Dec 22, 2008 2:58 pm

(In old man voice)...Back in the day...

When I was a kid on the farm, every valve stem had that kind of core.

I've been looking for them in stores for quite some time now, to no avail.

It would only take a second with some side cutters, and the spring would be no more. :D

I just got off the phone, although they are no longer a stocking item at most stores, they are still available, I've some on the way from a local tire shop. :)

Aircraft Spruce has a schrader valve core 2300hv which is similar.(but rated to 2000psi.)

If you think I might be calling my local A.M.E. next, you're probably right. :wink:
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Unread postAuthor: jackssmirkingrevenge » Tue Dec 23, 2008 3:46 am

Gippeto wrote:Jack, where did you find that other one?


Haven't the foggiest, I pick up inner tubes from the street, heaven knows where that came from :roll:
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Unread postAuthor: ALIHISGREAT » Tue Dec 23, 2008 4:12 am

How about using a presta valve?

these cores look moddable
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Unread postAuthor: inonickname » Sat Jan 17, 2009 8:51 am

Gippeto wrote:(In old man voice)...Back in the day...

When I was a kid on the farm, every valve stem had that kind of core.

I've been looking for them in stores for quite some time now, to no avail.

It would only take a second with some side cutters, and the spring would be no more. :D

I just got off the phone, although they are no longer a stocking item at most stores, they are still available, I've some on the way from a local tire shop. :)

Aircraft Spruce has a schrader valve core 2300hv which is similar.(but rated to 2000psi.)

If you think I might be calling my local A.M.E. next, you're probably right. :wink:


Our local roadhouse/service station has them. Maybe you should try there? I have dozens of those cores.
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Unread postAuthor: Gippeto » Sat Jan 17, 2009 11:09 am

Believe me, as an ardent supporter of low cracking pressures I've checked everywhere locally.
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Unread postAuthor: Daltonultra » Sat Jan 17, 2009 3:45 pm

I've seen a few of the ones Gippeto posted, with the long spring. Some of the older trailers they pulled out of the back lot at my old employer had those. I think they've been done away with in favor of the smaller type.

The one JSM posted, with the external spring wrapped around the button, I have never seen before. They certainly can't be common. Leaving the spring exposed to the outside seems like a really bad design to me.

The biggest variation I usually see is the length of the button and the color of the seal.

The only ones I've seen currently in use on passenger or truck tires are the type with the internal spring. Some of the big mining equipment tires I've hauled have used larger types of valves that allow more airflow, but then again, they use an on-board inflation system most of the time.
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