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


API STD 614 Chap.2 - Bleed tubing location for Low-pressure alarm/trip

API STD 614 Chap.2 - Bleed tubing location for Low-pressure alarm/trip

API STD 614 Chap.2 - Bleed tubing location for Low-pressure alarm/trip


I would like to ask for your opinions on the following;

1) Normal open bleed for low-pressure alarm/trip
As for pressure transmitters for low-pressure alarm/trip, API STD 614 Fig.B.26 requires normal open bleed to be returned to reservoir.
I think this normal bleed line is the following purpose;
- continous automatic vent whenever oil system starts without operator intervention
- to avoid abnormal signal transfer (presssure still not low) when the root valve is closed by mis-operation.

Could you advise me whether my understanding is correct?

2) Normal open bleed for 2oo3 voting low-pressure trip transmitters
API STD 614 Fig.B.13 shows that normal bleed line located before each root valve of transmitter, which is different from Fig.B.27.
I think, if my understanding on the purpose of normal bleeding as above is correcct, this bleed line shall be located after each root valve, which means
- individual root valve and individual bleed line to reservoir per transmitter is required or
- one common root valve and common bleed line to reservoir is required

Would you advise me which one is correct? what is correct location of bleed line to reservoir for this case(2oo3PT, PT)?

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


White Paper - The Evolving Landscape of Commercial Battery-Powered Trucks
What’s driving the evolving landscape of truck electrification? What are the barriers, motivators and strategies for accelerating the electric transition? What insights and resources are available for today’s design engineers working to achieve industry disruption and evolution? For answers to these and other pertinent questions, read this white paper. Download Now
eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. 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