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Old 07-19-2010, 05:38 PM   #1
mysterio
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Default O-ring replacement

i was browsing on mcmaster-carr, and i found this (9691K55) seal, could it possibly replace o-rings in a pump?

EDIT: or 9403K58 on here

Last edited by mysterio : 07-19-2010 at 05:44 PM.
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Old 07-20-2010, 07:14 AM   #2
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Default Re: O-ring replacement

Yes, if you get the dimensions just right, or perhaps even trim the outer rim to fit? Ben actually used "piston cup seals" (from the first page you linked to) in Supercannon II's firing chamber. However, the fit was tight and it's probably not worth dealing with unless you need a really reliable, high-pressure system.

The latter link, not so much. The line of text at the top of the page says they're meant for scrubbing stuff off of surfaces? Something like that. They're probably not meant to seal against pressure, especially when sliding.
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Old 07-20-2010, 01:03 PM   #3
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Default Re: O-ring replacement

ok. ill use o-rings for now, and if that fails, then ill use your suggestion

Last edited by mysterio : 07-21-2010 at 07:30 PM.
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Old 07-21-2010, 07:30 PM   #4
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Default Re: O-ring replacement

while researching parts for a laminator, i found this . if i plugged up the hole on the expanding parts end, would this be a viable option for a pump?
heres some specs
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Old 07-21-2010, 07:40 PM   #5
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Default Re: O-ring replacement

I believe such devices have been suggested in the past, not sure if they've been tried. The obvious concern is it's designed to accomodate slow movement.
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Old 07-21-2010, 09:41 PM   #6
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Default Re: O-ring replacement

yea, i guess so. i think im just gonna have to go there and look at it myself
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Old 07-22-2010, 12:55 PM   #7
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Default Re: O-ring replacement

Creative thinking, but I agree with cantab, it's hard to tell how much friction there will be, so I hope you find it in the store. Also check to see if the outer pipe must be what comes with the piece, or if you can use a much longer, pump-size piece of pipe. The default outer pipe is probably too short.
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Old 07-22-2010, 12:56 PM   #8
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Default Re: O-ring replacement

okay then, i guess its off to lowes on saturday for me!
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Old 08-11-2010, 12:56 AM   #9
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Default Re: O-ring replacement

alright. none of the above worked out, but i did find four other options. 3 of which are rubber cylinders, and one of which is several rubber washers.
http://www.mcmaster.com/#washers/=8c24hy
http://www.mcmaster.com/#rubber/=8c1ivc
http://www.mcmaster.com/#rubber/=8c1ix2
http://www.mcmaster.com/#rubber/=8c1iw3
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