×
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

Packing for 1300 ¦F Valve

Packing for 1300 ¦F Valve

Packing for 1300 ¦F Valve

(OP)
I have a valve application where a 10" class 150 butterfly valve is in a service that operates at 1300 °F, has 14% oxygen, 7% SO2, and balance N2 in the process stream.  Valve steam leaks are a real problem.  Conventional graphite packing oxidizes and disappears above 900 °F, which we have proved.  Does anyone have any suggestions for alternate packing materials?  

My other option is a re-designed custom valve with extended bonnet to get the packing away from the intense heat.

RE: Packing for 1300 ¦F Valve

Unless you can keep air away from the graphite I don't think you have a choice but to extend the bonnet and/or add heat fins.

Master Flo www.masterflo.com/Products/Other/seals.html
has a metal stem seal but I don't know how well it works and doubt they'd sell it to a competitor. You could try metal C rings or U-cups but I'm betting they would eventually wear.

The only other thing I can think of is asbestos, but there aren't very many places left that still allow it to be used.

RE: Packing for 1300 ¦F Valve

We (SchuF) had a similar application for similar temperatures. We eventually had packing rings custom made in calcium silicate yarn at a company in the UK (http://www.beldam-crossley.co.uk/).

RE: Packing for 1300 ¦F Valve

Sometime back we have used metal foil packing. This is a metal foil twisted to form packing, which can be cut formed into ring and can be used. But I don't have much details now.

RE: Packing for 1300 ¦F Valve

You need to check with ADAMS valve, Houston Texas  (713)973-2490.  They have done extensive type research and testing on valves and valve packing at high temperature.  They offer a triple offset butterfly valve that is used extensively in the power industry and Petrochemical.  Use their engineering resources and expertise to help solve your problem

RE: Packing for 1300 ¦F Valve

I suggest you contact one of the following packing manufacturers:
John Crane
Sepco
Garlock
Raybestos

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