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

8" ball valve passing

8" ball valve passing

8" ball valve passing

Hello guys,

i have GAS line(34 bar) with ball valve 8". it is passing and need your support in how to rectify this valve safely.

Suction valve is isolate
discharge is isolated
check valve is existing in discharge side.

main equipment in line is Compressor very costly.
The pipe is showing 15 bar in above situation. after venting the line, about 3 hours same reading is showing ( 15 bar)
Manually i open and closed the valve to make sure it is fully closed.
i am about to rotate the valve 180 degree but this is very risky it maybe damage the seat and heavy passing will happen and damage the compressor
To dismantle these valve i need black out for our power plant ( 3500 MB) which is not good way to do at all.

Please share your strategy


RE: 8" ball valve passing

A single ball valve can easily pass.

Some details of the valve required, sectional drawing, type of seats etc.

Some valves allow you to inject grease or sealant into the seats. Does yours?

If you have a body vent in the valve you might be able to fit a vent pipe and vent the leakage to atmosphere/ safe area?

I don't understand why you want the valve to seal or why this would damage the compressor??

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

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


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