×
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!
  • 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

Jobs

booster pump

booster pump

booster pump

(OP)
Hi all,

Maybe this is a stupid question...but help me anyway..

I have a pump with NPSHr approx 5 meter. The NPSHa is only 2 meter. It was a design mistake. Anyways, this pump capacity is 1500 m3/hr at about 10 bar.

To rectify this, I was thinking to install a booster pump upstream of this pump. Do I need to find a pump that also matches a 1500 m3/hr capacity (with lower head; proabably 5 bar)? or could i live with a lower capacity pump? Medium is water.


Thanks

RE: booster pump

Get a pump with a BEP flow at the same capacity. If you try a smaller pump, you'll not be pumping at best efficiency at the 1500 m3/h flowrate, if it can do a 1500 m3/h flowrate.

What would you be doing, if you knew that you could not fail?

RE: booster pump

The booster pump must be of similar capacity and the the NPSHR must be lest than 2 meter at 1500m3/hr . The discharge head of the booster pump must be sufficient to over come the losses of the piping between the discharge and the main pump suction and provide the NPSHR to the main pump.
If you choose the booster to have 5 bar DP you will have total pump DP of 15 bar in the system.
and you will get more that 1500m3/hr if you do not throttle the discharge.

RE: booster pump

Just for brainstorming...
Anything to do to improve the existing system?
- increase NPSHA in the suction system
- modify pump to obtain a lower NPSHR
- put another pump in parallel
The installation of a booster pump will lead to shutoff troubles in the discharge system and will increase the operating costs.
An analysis of CAPEX/OPEX should be done to compare alternative solutions.

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