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vacuum seal on experimental apparatus



 
 
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  #1  
Old May 19th 09, 02:42 AM posted to rec.crafts.glass
Permafacture
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Posts: 6
Default vacuum seal on experimental apparatus

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
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  #2  
Old May 19th 09, 03:13 PM posted to rec.crafts.glass
charlie
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Posts: 6
Default vacuum seal on experimental apparatus


"Permafacture" wrote in message
...
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


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


  #3  
Old May 21st 09, 05:55 PM posted to rec.crafts.glass
No Body
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Posts: 4
Default vacuum seal on experimental apparatus

"charlie" wrote in message
...

"Permafacture" wrote in message
...
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


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

Depends on how hot he plans to go, and with what substances inside.


  #4  
Old May 24th 09, 12:53 AM posted to rec.crafts.glass
Permafacture
external usenet poster
 
Posts: 6
Default 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.
  #5  
Old May 25th 09, 09:49 PM posted to rec.crafts.glass
No Body
external usenet poster
 
Posts: 4
Default vacuum seal on experimental apparatus

"Permafacture" wrote in message
...
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.



what are you trying to make? C10H15N

  #6  
Old June 3rd 09, 12:43 AM posted to rec.crafts.glass
Permafacture
external usenet poster
 
Posts: 6
Default vacuum seal on experimental apparatus


what are you trying to make? C10H15N


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

This is an adsorption chiller.
 




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