Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Cryogenic processor with Perlite insulation

Cryogenic processor with Perlite insulation

Cryogenic processor with Perlite insulation

I am designing a cryogenic processor, size 300x300x600mm rectangular with maximum efficiency.

Foam insulation will be very inefficient and other MLI and High vacuum insulation will be very costly.
So i was thinking to use 150mm thick insulation (annular section filled with expanded perlite. just my concern is whether vacuum is needed after loosely filled perlite inside this section, or only airtight section is fine.

or any other option for insulation.

RE: Cryogenic processor with Perlite insulation

Please do not double post.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Cryogenic processor with Perlite insulation

spot-on EdStainless

RE: Cryogenic processor with Perlite insulation

large cyro installations that use perlite also add a hollow column filled with extra perlite called " stayfulls" to ensure that compaction of perlite over time does not leave an un-insulated void at the top. Also, perlite has traces of asbestos in it, so you may need to add legal weasel-words to your employees contracts.

"In this bright future, you can't forget your past..." Bob Marley

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close