Vacuum Chamber Specs?

[Draven]

I'm having a vacuum chamber made and although it's much cheaper than buying a ready-made one, can any one just confirm the following for me:

How thick should the plexiglass lid be - minimum?

How thin can the walls of the chamber be?

The pump to be used will be pulling 28lt per minute.

If you have one and you take just a minute of your time to measure the above, I'd be eternally grateful and will mention you in my Oscars speech.

Thanks

Draven

 

[clonesix]

Your pump is the most important thing. You need one that will pull 29"Hg minimum to degas RTV. I have a 2 stage Robinair. It works good.

For the chamber, itself, I use a heavy duty 65 qt aluminum stock pot with 0.25" walls, and 1" piece of plex for a lid.

 

[exoray]

I'm having a vacuum chamber made and although it's much cheaper than buying a ready-made one

Depending on size it's really not that cost effective to make one... You can get a pressure paint tank for about $40...

How thick should the plexiglass lid be - minimum?

Most people recommend 3/4" to 1" but it really depends on how big of opening...

How thin can the walls of the chamber be?

What material?