Answer / naresh sharma

NPSH stands for net positive suction head, for any pump
acc. to the design & capacity of pump a net pressure head
is required which is called net positive suction head. if
preesure falls the NPSH, then cavitation will occur.

Answer / prasad

net positve suction head

Answer / mahendra singh

NPSH - net positive suction head.
Actully every fluid has some veporisation pressure and
below this pressure fluid can be veporise.if this
veporisation happened inside the pump means it will be the
cause of cavitaion inside the pump which can damage the
pump impellers and casing.so if we want to escape from this
possibilitym, pump suction pressure should be more than its
working fluid veporisation pressure.this min. pressure is
known as NPSH.

Answer / abdul hameed

NPSH: Net Positive Suction Head.
By definition:NPSH is an algebric sum of all the heads
(atmospheric head,vapour head, friction head, static head)
available at the suction eye of an impeller.

Answer / rakesh jaiswal

its is net positive suction head to avoid cavitation since
pressure is below the vapour pressure bubbles forms that
cause cavitation to avoid these we go for a pressure more
then vapour pressure
suction head = npsh + vapour pressure

Answer / ibrahim_mahmoud

NPSH is indication about bubble formation in pump suction side
to avoid bubble formation that results in cavitation :

(static suction head - head losses in suction pipe -
entrance kinetic losses at suction + atmospheric pressure
head - vapor pressure) > NPSH)r

the left side term is the available NPSH of our piping system

Answer / bn

NPSH; net positive suction head
NPSHA; available, is a function of the inlet piping system
NPSHR; required, is a function of the pump design and
operating speed
NPSH applies to gas free liquids !
NPSH does not apply to fluids !
Don't say 'fluid' when you mean 'liquid' !
They are not the same !!

Answer / rajeev

npsh means net positive suction head.when suction presser below then pump prassur that time bulb forme near of the impallar iye. but pump take water under pursser.that moment
that bulbs boiled this is the reason of cavitation

what are the different theories of failure under static load, explain briefly?

0 Answers   Bechtel,

more base coross sectonal area object can stand steadly than a les cross section why

1 Answers  

What is the formula for heat loss in a pipe?

0 Answers  

Explain briefly- good combustion of auxiliary boiler?

1 Answers   ABC Inc, RRB, Siemens,

Diploma Mechanical Engineer i had attened more over 100 interviews they are all asking the same question "TELL ME ABOUT YOURSELF"

3 Answers   Automobile, Bajaj, Blue Star, Dr Reddys, Escorts, Honda, Indian Ordnance Factory, Maruti Suzuki, Micro Resources, Neyveli Lignite Corporation, Nissan, Ordnance Factories Board, Polytechnic, Rashmi, Reliance, Steel Plant, TATA, Tata Marcopolo, Tata Motors, Tata Steel Limited, TCS, Toyota, TVS,

what is p11

5 Answers  

what roal of balancing disk in boiler high preesure feed pump.

4 Answers   ABSC, HPCL,

why viscosity is measured in kinematic viscosity.?

0 Answers  

HOW THE POWER INTERMEDIATE WITH TON OF REFRIGERATION(TR) COMPRESSORS ? HOW THE POWER IMPORTANCE TO COMPRESSOR FOR THE LOAD ?

2 Answers   Sanmar,

what is tooth profile

0 Answers   IOCL, TNPL,

why zeroth law is call zeroth law of thermodynamic ?

4 Answers   Jindal, TATA, TTL,

What is the purpose of stern tube?

0 Answers