×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

Butterfly valve face to face dimension

Butterfly valve face to face dimension

Butterfly valve face to face dimension

(OP)
Difference between short pattern and long pattern valve is face to face dimension changes, but on what basis we decided we need short patter or long pattern

RE: Butterfly valve face to face dimension

Long pattern is used when you want to replace a gate valve with a butterfly valve. Short pattern is used when only a a butterfly is specified and used, such as new plant construction.

RE: Butterfly valve face to face dimension

You made me curious. I find a couple of older posts with essentially the answer above. However, if you look at, say municipal water valves, the laying lengths of gate valves do not match up to either the long or the short body butterfly valves. (There's also a wafer valve, which lacks the full flanges.)
With the short-body style, the disk can actually extend beyond the flange face when open, so you can't necessarily fully open a short-body valve with a blind flange attached. But then again, I'm not sure why you'd need to do that, either.

RE: Butterfly valve face to face dimension

Quote:

With the short-body style, the disk can actually extend beyond the flange face when open, so you can't necessarily fully open a short-body valve with a blind flange attached.

The butterfly valve is intended to work as removed the blind flange and connected to the pipe.
It's a good lesson learned that the design should confirm the disc of the wafer type butterfly valve to be fully open in operation without interference. If it's a concern, a long pattern butterfly valve can be specified.

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! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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