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

Help identify P&ID symbol

Help identify P&ID symbol

(OP)
Hi - I have attached a picture of the symbol. It is the one to the left of the pH meter. It is part of a pH water control loop. Does anyone know what it could be? The piping is 3/4" PVC SCH80. I think it is some kind of check valve w/ injection port or bleed port. Thanks in advance.

RE: Help identify P&ID symbol

My guess is: Three-way-valve

Sometimes its possible to do all the right things and still get bad results

RE: Help identify P&ID symbol

a slightly bigger snapshot would help a bit. why are there two lines coming out on the LHS of this item?

Is it some sort of sight glass?

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

RE: Help identify P&ID symbol

(OP)
Here is a picture of what it actually looks like in the field. You are looking directly at it. The flow is from the back and then down I think. So that is the question: What is this? And also why are there two lines coming out that go to nothing, I don't know that's all there is? I apologize for the picture quality it's all I have.

RE: Help identify P&ID symbol

My thoughts are that is a probe, assuming to measure pH. In the picture, the flow comes into the right of the fitting, turns down, and flows across the outside of the probe. It may require actual flow across the element versus just tapping into a threaded connection and having a stagnant spot.

Thanks,
Ehzin

RE: Help identify P&ID symbol

Looks like a flow cell. Some of the pH instruments now how multi-function such as temperature monitoring.

RE: Help identify P&ID symbol

What does the Process Diagram Legend Sheet say?

Sometimes its possible to do all the right things and still get bad results

RE: Help identify P&ID symbol

(OP)
Umm yes, if there was a key or legend or an answer in the back of the book, I wouldn't waste everyone's time. On the legend there is a flow switch entry that doesn't have any pictogramme associated with it so just to further muddle the matter...I don't think its a flow switch but its possible I guess, kind of a weird symbol for a flow switch.

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