×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

What will the presure read

 Forum Search FAQs Links MVPs

What will the presure read

(OP)
Sorry guys an automation guy so be patient with me. If I set from the pump at point B with 320 bar flow set on relief bar and 160 bar set for point A on the pressure reducing valve . What will the pressure read at port MX3 and MX4.

If Ev 1-16 is off while pressure read o bar at at Mx3 and 320 bar at mx4 . What about when it is EV 1-16 is on and the downstream of X3 is closed

RE: What will the presure read

There is a doubt about the representation of valve 117-01. The ports are B at A (and not P and T as for a pressure relief valve).
a) It can be a pressure reducer, in this case it is a normally open valve without pressure. So the horizontal part with the arrow must be in the axis of the holes A and B. And the tail perpendicular to the arrow must be at the bottom. If this is the case, the pressure in X3 is 160bar if EV-16 supplied with maximum tip limited to 180bar by the pressure limiter 118-01. In X4 we read a pressure which depends on the upstream circuit.
b) But it can also be a sequence valve. In this case, the piloting is on side B (and not on side A as shown). In this case we only read a pressure in X3 equal to the pressure in X4 provided that it is greater than 160bar. And that EV1-16 is supplied. If EV1-16 is cut we read 0bar in X3 and 160bar in X4.
c) It’s a special valve that I don’t know. And so without further details on the diagram I cannot help you.
Maybe another specialist can correct me?

RE: What will the presure read

(OP)
Thank you but I one question,
. If EV1-16 is cut we read 0bar in X3 and 160bar in X4.

Regarding the above why dont we read 300 bar at X3 since that in input pressure from the pump. Dont you think X3 should read the 300 bar. Correct me if I am wrong

RE: What will the presure read

When EV1-16 is off, P is connected to A which is connected to tank. So 0 pressure.

Ted

RE: What will the presure read

(OP)
Thanks Hydtools,

So when EV 16 is off. There will 0 bar pressure at MX3 and 300 bar at MX4 (considering the relief valve from the pump is set 300 bar). Is that right.

RE: What will the presure read

This is a pretty standard thread here on this forum, a cut-out schematic about pressure or a valve function. The problem with this post is that the cut-out is taken out of context. The most important context is...
-"How is the system supposed to work correctly?"
-"What is supposed to happen on the actuator side of the system?"
or
-"how is pressure/flow provided into the system?"

So in this specific post, what "action" is expected by design in the system?

Just asking what the pressure "would be" is basically not teaching the OP anything neither can the OP get to understand "why" the pressure sequencing has to behave the way it is designed to do.

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.

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

Resources

Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
The Great Project Profitability Debate
A/E firms have a great opportunity to lead the world into the future, but the industryâ€™s greatest assetâ€”real-time dataâ€”is sitting wasted in clunky, archaic ERP platforms. Learn how real-time, fully interactive dashboards in a modern ERP allow you to unlock data that will shape the future of the world. 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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!