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


Resilient or metal seated gate valves

Resilient or metal seated gate valves

Resilient or metal seated gate valves

Is there reason to spec one over the other instead of just life span?  The city I am doing work for specs only brass metal seated, but the contractor says that he has never used anything but resilient wedge gate valves...and that they are "better"
I have read up on them some, but dont really see a reason to choose one over the other... either have a better seal, or last longer...

"Don't worry about the world coming to an end today. It's already tomorrow in Australia."  
---Charles Schulz
"Beer is living proof that God loves us and wants us to be happy."
---Benjamin Franklin

RE: Resilient or metal seated gate valves

Resilient-seated gate valves have been used for more than a quarter century.  While there are perhaps many aspects to compare, I believe a few advantages of modern resilient-seated valves for example over iron-body bronze mounted (IBBM) gate valves are:

1.  Basically a clear and unobstructed waterway, that does not exhibit a bottom potentially debris-trapping "pocket" (like to receive the wedges that hit down in same and in various fashions spread e.g. IBBM disks).
2.  Demonstrations that at least some resilient-seated gate valve designs will effectively seal (and even bottle-tight) against at least some significant foreign objects like rocks and steel nails (that will generally thwart metal seals when trapped in the seat area).
3.  At least some resilient-seated gate valve designs employ quite strong principal parts of ductile iron only, whereas IBBM gate valves per some standards/designs still can contain weaker gray cast iron.

While I believe "better" is something that should ultimately be defined by the users (including I would think Contractors, as it appears is one party you're already conversing with, who sometimes are asked to even test against such valves), I believe there has been a dramatic relative increase in demand over many years for resilient-seated as opposed to IBBM valves, and particularly in common municipal fields.  [You may be interested e.g. in some perspectives of a very large valve manufacturer (who I know has produced both types for a great many years) reflected now at e.g.  http://www.acipco.com/afc/videos.cfm.]        

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!


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