Re: pump problem

Please refer to thread no. 952. The site cited by the moderator is excellent.

In reaction to what Bruce has written, the subject about NPSH is taught at the school if you're taking BSME - it is either in Fluid Mechanics or Turbomachinery (at least way back in the 70's).

• In PipingDesign@y..., Bruce Bullough <bbullough@s...> wrote:
  > 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@t...]
  > Sent: Wednesday, July 25, 2001 4:13 AM
  > To: 'PipingDesign@y...'
  > 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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