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Epoxy vs oily barrel

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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Epoxy vs oily barrel

Unread postAuthor: josephlys » Mon Apr 16, 2012 8:27 am

Without putting too much thought into it, I epoxied a check-valve in my air-chamber without first cleaning the grease out. I did casually wipe it with my fingers though, but I don't think that counts. Can it still take 100psi without coming lose, it seems to be sturdily stuck in place but I'm not 100% sure it will effectively handle the high psi. What do you think??
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Unread postAuthor: jackssmirkingrevenge » Mon Apr 16, 2012 8:46 am

if you epoxied a threaded or heavily roughened part, it shouldn't be that much of a problem. If not, I would redo it.
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Unread postAuthor: cammyd32 » Mon Apr 16, 2012 11:08 am

Do a hydrostatic test of it before using it for gas, and if it moves at 100psi then you know it isn't up to the job ;) But strength of the joint really depends on what epoxy you're using though, have a careful look at the packaging or Google the brand etc, that might yield some answers as to it's strength.
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Unread postAuthor: josephlys » Mon Apr 16, 2012 11:33 am

It's a set in 5min Steel epoxy. Would pressing down with 100lbs body weight simulate the 100psi?
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Unread postAuthor: Gun Freak » Mon Apr 16, 2012 5:18 pm

Just pressurize it while standing on the other side :D
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Unread postAuthor: Marffy » Sat Apr 21, 2012 6:05 pm

Yeah. Just remotely fill it to at least 100 (150 or 200 to test its limits) and see if it shoots out
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