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Subject:
Re: Water Exhibit Sealers
From:
Earl Stirling <[log in to unmask]>
Reply To:
Informal Science Education Network <[log in to unmask]>
Date:
Fri, 26 Jun 2009 13:19:05 -0700
Content-Type:
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ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

I'd recommend an o-ring also.  Use an material for the o-ring which is
compatible for both water and the type of oil you're using.

one design I just ran across this morning on one of our exhibits (designed
to hold a vacuum, but that's just the inverse of what you want to do ;) ):

A cap with a clearance fit into your tube, a plug with a gland for an
o-ring, and use three screws to squeeze them together and expand the o-ring
against the tube.

I included a quick drawing, see the PDF in this post:  O-Ring Plug plus
Drawing <http://bangengineering.com/blog/?p=24>

----
Earl Stirling
Swiss Army Knife
e x p l  O  r a t o r i u m
3601 Lyon St
San Francisco CA 94123
+1.415.353.0401


On Fri, Jun 26, 2009 at 10:17 AM, Jeff Rosenblatt
<[log in to unmask]>wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
>
> *****************************************************************************
>
> Good afternoon everybody,
>
>
>
> I need sealer recommendations for a water exhibit piece.  We have a 2
> foot tall cylinder, about 8" in diameter, and we plan to fill with a
> water/oil mixture, which can then be turned upside down over and over in
> a circular motion.  The cap pieces are fitted, but we need a sealant to
> ensure the liquid does not leak out.  The sealant also has to be able to
> cure and not degrade with exposure to water and oil.  Weight-wise, the
> caps are supported to hold the liquids in the cylinder...all they have
> to do is effectively seal the container and not degrade.
>
>
>
> Any recommendations based from experience?  I am grateful for any and
> all input.
>
>
>
> --Jeff--
>
>
>
> Jeff Rosenblatt
>
> Director of Science City
>
> Union Station
>
> ph:  816-460-2218
>
> email:  [log in to unmask] <mailto:[log in to unmask]>
>
>
>
>
>
>
> ***********************************************************************
> For information about the Association of Science-Technology Centers and the
> Informal Science Education Network please visit www.astc.org.
>
> Check out the latest case studies and reviews on ExhibitFiles at
> www.exhibitfiles.org.
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***********************************************************************
For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

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