RE: pump suction-cavitation

Dear Gang,
Can you sugest the name of the Book please?

> -----Original Message-----
> From: Gang Cvg [SMTP:cvg_gang@yahoo.com]
> Sent: Saturday, May 18, 2002 11:55 AM
> To: PipingDesign@yahoogroups.com
> Subject: Re: [PipingDesign] pump suction-cavitation
>
> Dear Srinivas,
>
> Any text book on hydraulics will discuss the phenomenon of cavitaion.
>
> It is basically a problem at centrifugal pump suction region ( more at the
> eye of the impeller )on account of the vapour trapped / formed. The vapour
> separated from the pumped fluid occurs at the lowest pressure zone. The
> nascent bubbles impinge / break at the metal surface of the impeller ( eye
> ) causing severe pitting resulting in loss of material. If allowed to
> continue for long time it results in imbalance of the shaft dynamics and
> causes vibration problems and subsequently failure of the pump.
> Installation of an eccentric reducer FSB causes vapour pocket to be
> permanent at the suction nozzle. This aggravates the otherwise potent
> problem of cavitation. The only precaution to ward off this monster is to
> have a good cushion / margin of ( NPSH available minus NPSHrequired )
> NPSHr will be furnished by the pump vendor.
>
> I suggest you read further about this in some standard text-book /
> hand-book on hydraulics.
>
> Good luck!!!
> C. V. Gangadharan.
> --- Musthi_S_Srinivas@ril.com wrote:
> > To avoid cavitation the eccentric reducer at pump suction nozzle is
> kept flat up.
> > can you brief me how cavitation occurs if the
> > reducer is kept flat down.
> >
> >
> > regards
> > srinivas
> >
> >
> >
> >
> >
> >
> >
>
>
> __________________________________________________
> Do You Yahoo!?
> LAUNCH - Your Yahoo! Music Experience
> http://launch.yahoo.com
>
>
>
> _____________________________________________________
> Unsubscribe: PipingDesign-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
Received on Sat May 18 05:56:00 2002