vacuum seal on experimental apparatus

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Howdy:

I'm planning an experimental apparatus.  The part that i am asking
about here is a seal between a borosilicate chamber (with an inch or
so diameter opening) and small diameter metal tube.  The chamber will
be evacuated by an adsorbent and may pull a very decent vacuum, I'm
not sure how strong (haven't built the thing yet).  Also, The chamber
will be heated over a fire for several hours, with either a positive
or negative pressure inside (will vary between different
experiments).  heating won't be right next to the seal or anything,
but in that time the seal would eventually get hot.

Anyone have any experience with glass/metal seals in these conditions?

much thanks,
elliot

Re: vacuum seal on experimental apparatus

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i would think a high temp rubber or gasket material would work. there are
plenty around car engines, so there must be something available.



Re: vacuum seal on experimental apparatus
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    Depends on how hot he plans to go, and with what substances inside.



Re: vacuum seal on experimental apparatus
300 C would be really hot.  A hot engine temp is about as far as i
plan to go.

Contents will be calcium chloride/hydroxide and water.  ammonia
resistance would be nice also.

Re: vacuum seal on experimental apparatus
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what are you trying to make? C10H15N


Re: vacuum seal on experimental apparatus

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I dont think you use calcium chloride to make any drugs that i know
of.

This is an adsorption chiller.

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