×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Methanol vs Viton seals in valves

Methanol vs Viton seals in valves

Methanol vs Viton seals in valves

(OP)
People,

We have a methanol injection line to the wellheads. This is very unlikely to be used but the potential is there. I don't know the concentration of Methanol if it is going to be used and as a result, viton seals are not good enough where the media has methanol concentration. Do you know more details about this and do you know what is a better seal to use in this application?

Rgds   Marcell

RE: Methanol vs Viton seals in valves

utlandmah,
   it sounds a little strange to me to hear that VitonTM "is not good enough" with methanol... apart for concentration, are there other issues (temperature, pressure and/or dirt)?

   What happens to VitonTM seals in such a service?  
     
   There are many VitonTM grades: in the same website mentioned by hydtools, you can find a "Viton Selection Guide" which can help you selecting the best one for your service:
         http://www.dupontelastomers.com/Products/Viton/selectionGuide.asp

   If you'd like to check out other compounds, like the more expensive KalrezTM, you can find other "Application Guides" in the relevant sections of the same website:
         http://www.dupontelastomers.com/kag/

Hope this helps,    'NGL

RE: Methanol vs Viton seals in valves

(OP)
Gents,

I am in Australia and the valves suppliers here use James Walker O-Rings. In order to increase the resistance of an o-ring against methanol (which cause O-ring swells or volume increase) you need to increase fluorine content of the O-ring which this has an adverse effect on low temp resistability of the o-ring. A better material to use where methanol exists, is HNBR 958!

Regards,
Marcell

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!


Resources