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


Centrifugal pump_Fire fighting system

Centrifugal pump_Fire fighting system

Centrifugal pump_Fire fighting system


Centrifugal pump discharge side eccentric reducer can be used? if not possible please explain the valid reason
and centrifugal pump discharge nozzle if possible to connect pipe directly without any reducer?

please clarify anyone...


RE: Centrifugal pump_Fire fighting system

Your question is not clear.
Can you please provide more information:
- Pump Suction Line size
- Pump Suction Nozzle size
- Pump Discharge Line size
- Pump Discharge Nozzle size

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

RE: Centrifugal pump_Fire fighting system

Can it be used - I can't see why not

Can you connect with reducer - Yes, but it is normal to increase piing size from pump nozzle size to reduce pressure losses in the line

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

RE: Centrifugal pump_Fire fighting system

You can use an eccentric reducer on the pump discharge, however it is not as common as using concentric from what I've seen.

What is your reasoning for wanting to use an eccentric reducer?

Is it a top discharge or side discharge pump?

RE: Centrifugal pump_Fire fighting system

Yes and Yes.
It would help if you expanded your question to give reasons as to why you are asking, our crystal ball gazing isn't all that good.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Centrifugal pump_Fire fighting system

In my experience, most pumps have had a concentric reducer on the discharge side of the pump, per LittleInch's comment (and commonly an eccentric reducer on the suction side). But I don't see a problem with having an eccentric reducer on the discharge.

RE: Centrifugal pump_Fire fighting system

the eccentric reducer should be used in suction side to prevent air bubbles inlet to pump so is mandatory in suction side as per NFPA20.
so there is no problem to used it at discharge .

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!


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