×
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

Guide line for ball diameter selection in BALL VALVE

Guide line for ball diameter selection in BALL VALVE

Guide line for ball diameter selection in BALL VALVE

(OP)
Hello

I am designing  Fire shutoff valve(Ball valve)
Is there any guidelines available for selection of ball diameter in ball valve
And is there any relation available for orifice diameter to ball diameter.

Thanks
John

RE: Guide line for ball diameter selection in BALL VALVE

You should be able to provide a bore hole diameter equal to pipe ID.

Draw a cube around the pipe and make the surface of the ball intersect the corners of the cube.  That's the minimum sphere diameter.

There wouldn't be much use for a larger ball than that.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

RE: Guide line for ball diameter selection in BALL VALVE

For rule of thumb, the bore diameter is 60% of the sphere diameter.  That tends to be a minimum.  But you need to check the contact area with the seat.  The above ratio may not ensure full contact area all around the seat when the valve is shut.

bcd

RE: Guide line for ball diameter selection in BALL VALVE

Not bad.  The circumscribed cube method gives a full pipe diameter bore equal to 57.7% of sphere diameter.  We could call it 60%.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.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