×
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

API trim 5 for steam service in API 600 gate valves

API trim 5 for steam service in API 600 gate valves

API trim 5 for steam service in API 600 gate valves

(OP)
I would like to hear any suggestions regarding use of trim 5 on gate vales in steam service.  Is there a temperature you would recommend moving from other trims to trim 5. Is there a better trim than trim 5?  When would galling be an issue, if at all?  Does "clean" or "dirty" service affect the trim decision?

RE: API trim 5 for steam service in API 600 gate valves

Typically I would recommend trim 5 more for reduced wear. If the valve is going to be operated frequently it's better to have trim 5, Also if the valve is in an area where it's a huge pain to service Trim 5 might be worth the upgrade.

In terms of valve wear reduction there isn't a much better material than stellite 6.

RE: API trim 5 for steam service in API 600 gate valves

We use Trim 5 and Trim 8 in steam gate valves here in NYC as a standard.  Where Trim 5 is full stellite and 8 is half stellite.  Not all too much price difference, but the standard is Trim 8 for most manufacturers so delivery may be easier.  If you need tighter longer lasting shut-off, where a gate valve is not a good option, we have moved to bubble tight ball valves.
By the way, the recommendation is not to use stellite for boiler feedwater containing Amines because they will leach the cobolt from the stellite and it comes apart.

Joe Lambert
http://www.control-associates.com/

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