×
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

Different Ball Valve Port Types
2

Different Ball Valve Port Types

Different Ball Valve Port Types

(OP)
What is the difference between a full port, regular port, or reduced port ball valve? I have read a forum about full port and regular port. We require a regular port ball valve but a vendor gave us a reduced port. Is there a difference?

RE: Different Ball Valve Port Types

Regular port is the same as reduced port.
Full port is full port.

Not every manufacturer's regular port, for the same size body, is the same. You need to check.

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
Albert Einstein
Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

RE: Different Ball Valve Port Types

Rule of thumb is a reduced port (as ashereng said, same as a regular port) is one size smaller. e.g.: 4" valve with a 3" port.  

In a real-world situation it causes so little additional resistance to the flow that you would be hard-pressed to measure the additional pressure loss.  Where it really makes a difference is if you will be pigging the line or if you are using the valve to isolate an insertion probe, such as a hot-tap flowmeter probe.  So it's not much of a flow restriction, it is a restriction to the passage of a solid component.  

Regular port ball valves are more economical on several levels.  The ball is the most precisely machined component so using a smaller ball saves money that way, both in machining time and in mass of material.  Then the secondary benefit that if you automate the valve you need less torque to turn the smaller ball, so you can buy a smaller, less expensive actuator.  

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