Smart questions
Smart answers
Smart people
Join Eng-Tips Forums

Member Login

Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • 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!

Join Eng-Tips
*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.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

SWMechanical (Mechanical) (OP)
25 Aug 08 12:21

I am looking to purchase a trunnion ball valve for sour gas service at 38C, 285 psig. What would be the best seal material?

The manufacturer has a list of choices:


JLSeagull (Electrical)
25 Aug 08 13:27
For sour gas, consider Aflas before ethelene propylene rubber (EPDM) or Nitrile (Buna N, HSN, HNBR).  I used to keep lots of elastomer data on my hard drive but don't have it now.  You can download lots of material compatibility charts from the web.  Consider Kalrez when money is no object.
NGiLuzzu (Mechanical)
1 Sep 08 3:05
         maybe you'll find useful to read thread408-201095: Methanol vs Viton seals in valves within this Forum.

         If you input your service conditions in the "Application Guides" mentioned therein,  you'll probably find the more suitable polymers for your application...

Hope this helps,         'NGL

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!

Back To Forum

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