×
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

Stem packing

Stem packing

Stem packing

(OP)
Hi all,

For pipeline ball valves (2500# gas service at 85ºC), my client wants stem packing instead of O-rings + gasket design, however, the suppliers give us the O-rings + gasket. Is it normal that the client want? What does he mean with "stem packing"?



Thank you very much,

Rocio Rodriguez



 

RE: Stem packing


Yes, it is normal in the way that a number of suppliers can supply after this requirement as standard products, readily commercial available.

'Stem packing' indicates or show to a construction where several stem sealing discs ringformed are placed on top of each other in a stack and compressed from outside (from gland or thruster) to form a thight sealing aginst the stem and between the body and stem boring to outside and inside of the valve body. It is usually possible to retighten the stack from outside several times before the stack has to be changed.

This construction may or may not be combined with o-rings or separate rings on lower parts of the stem, not compressible from gland.

This stack construction may be seen as better or better suited for the service at hand.


 

RE: Stem packing

Adding to the post by gerhard most valve manufacturers can supply either style packing. if some some reason they are not able to supply they style packing your client wants there are plenty of packing suppliers that can make up a packing set.

Just make sure you get your clients specific requirements especially since this is a high pressure valve.

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