O-ring replacement

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mysterio
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O-ring replacement

Post by mysterio » Mon Jul 19, 2010 10:38 pm

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 on Mon Jul 19, 2010 10:44 pm, edited 1 time in total.

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Silence
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Re: O-ring replacement

Post by Silence » Tue Jul 20, 2010 12:14 pm

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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mysterio
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Re: O-ring replacement

Post by mysterio » Tue Jul 20, 2010 6:03 pm

ok. ill use o-rings for now, and if that fails, then ill use your suggestion
Last edited by mysterio on Thu Jul 22, 2010 12:30 am, edited 1 time in total.

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mysterio
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Re: O-ring replacement

Post by mysterio » Thu Jul 22, 2010 12:30 am

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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cantab
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Re: O-ring replacement

Post by cantab » Thu Jul 22, 2010 12:40 am

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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mysterio
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Re: O-ring replacement

Post by mysterio » Thu Jul 22, 2010 2:41 am

yea, i guess so. i think im just gonna have to go there and look at it myself

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Silence
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Re: O-ring replacement

Post by Silence » Thu Jul 22, 2010 5:55 pm

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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mysterio
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Re: O-ring replacement

Post by mysterio » Thu Jul 22, 2010 5:56 pm

okay then, i guess its off to lowes on saturday for me!

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mysterio
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Re: O-ring replacement

Post by mysterio » Wed Aug 11, 2010 5:56 am

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/=8c1ix2http://www.mcmaster.com/#rubber/=8c1iw3

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