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!

*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.

Jobs

Needle valves vs ball valves in sub-sea control system

Needle valves vs ball valves in sub-sea control system

(OP)
Dear sirs, Good day,

we are doing a sub-sea project. our company requirements in feed phase to use a needle valve in sub-sea control system.the contractor proposed ball instead of needle.

My question is which better using needle valve or ball valve in sub-sea hydraulic system, what is the main points shall be considered in the selection.
the place of the valves as attached.


Please your feed back highly appreciated

RE: Needle valves vs ball valves in sub-sea control system

If for isolation as described, then ball valve is sufficient. The valve state is either open or closed. Needle valve would be preferred if some degree of control is required in the valve transition from open to close.

Ted

RE: Needle valves vs ball valves in sub-sea control system

Needle valves are also more prone to leakage if over tightened or contaminated. ROV's tend to use brute force, so I'd strongly suggest using a ball valve too.

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


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