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Screwed (?) schrader

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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Screwed (?) schrader

Unread postAuthor: FishBoy » Sat Jun 28, 2008 3:56 pm

Ok, i am going to buy the parts for my planned pneumatic and I decided to try to salvage the schrader valve from my first attempt. After trying many things (wrench, clamps, etc.) in hopes to break the epoxy, I decided to use a blowtorch since epoxy is heat-sensitive. Anyway, I'm not sure if it's safe to use or not so I figured I'd ask. As far as i can tell the (bottom) threads are ok and the valve functions, I'm just making sure there isn't something I don't know about.
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Unread postAuthor: SEAKING9006 » Sat Jun 28, 2008 4:06 pm

It should be fine.
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Unread postAuthor: judgment_arms » Sat Jun 28, 2008 4:12 pm

What pressures do you plan on running it at?
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Unread postAuthor: FishBoy » Sat Jun 28, 2008 4:23 pm

probably 120 psi max
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Unread postAuthor: pizlo » Sat Jun 28, 2008 4:53 pm

Your defiantly ok. Even if it broke on the inside when pressurized you'd probably just get a bad leak.
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Unread postAuthor: SEAKING9006 » Sat Jun 28, 2008 4:59 pm

Myself, I prefer a male quick-connect and a 1/2" ball valve.
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Unread postAuthor: MaxuS the 2nd » Sat Jun 28, 2008 5:52 pm

Just why did you epoxy it?
The joint should have been good enough not to use any bonding agent to stop leaks.
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Unread postAuthor: potatoflinger » Sat Jun 28, 2008 5:57 pm

It should still work well, but the heat from the blowtorch may have melted the rubber seal inside the valve. You may need to get a new valve stem for it. (You could just take the valve stem out of a bike tire or other schrader valve.)
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Unread postAuthor: SEAKING9006 » Sat Jun 28, 2008 5:59 pm

*coughusequickconnectcoughcough*
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Unread postAuthor: FishBoy » Sat Jun 28, 2008 8:28 pm

ok, i keep hearing about quick connects, where can you get them, can they be used with a bike pump, and how much do they cost?
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Unread postAuthor: pizlo » Sat Jun 28, 2008 8:49 pm

People really shouldn't suggest bad solutions, and not even explain them. A quick connect is 2 fightings, and one slides into the other and then air can pass through. Many compressors use this fighting. If you're using a bike pump you'd have to get some adapters and such to make it all work, so you're making more of a problem than buying a new schrader.
And seeking at least TRY to help... :roll:
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Unread postAuthor: SEAKING9006 » Sat Jun 28, 2008 8:53 pm

$7 for a 1/4" at home depot in the air tools section. You'll also need a ball valve and a 1/4" to 1/2" brass flip connector from the plumbing section. (The isle across from the PVC isle, should have sprinkler valves in it to.) If you want to use it with a bike pump, screw your schrader into a female quick connect. It's useful for when you get a compressor.



... Actually, keep using your schrader valves until you get a compressor. THEN start using quick-connects. They become very useful after that.
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Unread postAuthor: n-strike » Sat Jun 28, 2008 10:55 pm

I suggest getting a tire chuck rather than a quick connect. If you don't know how they look like, they look like these: http://www.pneutrend.com.tw/Img_Product ... 20copy.jpg
That one is a female, and this one is a male: http://www.pneutrend.com.tw/Img_Product ... 20copy.jpg
And by the way...do those things act like schraders, or does air just flow through?
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Unread postAuthor: D_Hall » Sun Jun 29, 2008 12:36 am

Ummmm.... What's a new schrader valve cost... $2?
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Unread postAuthor: psycix » Sun Jun 29, 2008 4:17 am

The proper term for something that can be screwed in because it has threads is "threaded" not "screwed".
Screwed means its fucked up, and its not. :)
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