RE: pump problem

From: <Bruce>
Date: Thu Jul 26 2001 - 14:08:00 EDT

The most important thing you can do is immediately study and understand the term "net positive suction head", or NPSH, bit "required" (by the pump) and "available" (by the system). If you don't have an NPSH problem, your flow will likely be higher (unless you have a PD pump) and your power will be lower. Those changes probably won't be large if the pump was specified and designed to operate in the optimal part of it's range. If you have an NPSH problem, the rest don't matter - get a new pump or modify the one you have if possible. NPSH is one of those things not typically taught in school, but almost mandatory to learn as soon as you go to work, if you work in anything related to liquids handling.

                       ... Bruce D. Bullough ...
                       Sebesta Blomberg & Associates
                       2381 Rosegate
                       Roseville, MN  55113
                       651/634-7344 - office
                       651/634-7400 - FAX

-----Original Message-----
From: R & D Team- B User [mailto:mrdbuser@tatachem.tata.com] Sent: Wednesday, July 25, 2001 4:13 AM
To: 'PipingDesign@yahoogroups.com' Subject: [PipingDesign] pump problem
Importance: High

Can anyone explain me " What will be the effect of specific gravity on pump characteristics ( i.e. head,flow and power )? " .

I have pump which will operate with the liquid of lower specfic gravity than design liquid. So what will be the effect on pump head,flow and power? Whether pump will deliver same head and flow as per original design or not. Pl explain me.
If anyone know the links for pump design & its fundamentals then pl let me know.
Thanks in advance
Hitesh

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Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Thu Jul 26 14:08:00 2001