×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

liquid ring vacuum pump

thread124-489687

liquid ring vacuum pump

liquid ring vacuum pump

(OP)
Two questions about liquid ring vacuum pump
1. if the liquid ring pump is not equipped with by-pass control, when gas stream is much lower than the pump working curve, will the pump be damaged?
For example, flowserver LPHX45008, 1740 rpm, at min. suction pressure 33 mbara, dry gas flow is 50m3/h. Gas from process is only around 5 m3/h. What will happen with the pump?
2. Condensable flows into the pump. Some articles say that liquid ring pump is designed for get rid of non-condensable, there must be a condenser upstream the pump to remove the condensable as much as possible. Some says, the condensable condensing in the seal liquid increases the pump capacity.
Which opinion is correct? One of the our systems has no condenser, can I install a liquid ring pump?

Thanks in advance.

RE: liquid ring vacuum pump

You need to go read the guides published by LRVP manufacturers.
1. It depends on the pump design, many will tolerate this by basically boiling the water, some designs don't like it though.
2. It depends, is your condensable missable in water? What is the boiling point of your condensable? Are you easily able to remove it from the water?

Lots of details.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: liquid ring vacuum pump

I have seen liquid ring pump shafts fail when there is too little gas being pumped. It is very similar to a centrifugal pump cavitating and being operated too far to the left of the Best Efficiency Point. If the pump is generating too much vacuum because there is insufficient gas flow then it is better to bleed air (or other non-condensable gas) into the suction.

Ed has covered Point 2 well, but consider also the heat balance. Do you want the latent heat to come out in a condenser or in the liquid ring pump?

Katmar Software - AioFlo Pipe Hydraulics
http://katmarsoftware.com

"An undefined problem has an infinite number of solutions"

RE: liquid ring vacuum pump

(OP)
Thanks for the reply.

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

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
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
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