Answer / manish thawani (bharuch) guja

NPSH is a term That indicates whether there is enough
pressure at the pump suction for the pump to operate properly

Answer / chinmay mhaskar

It is the absolute pressure head at inlet of pump, minus the vapour pressure head corresponding to the temperature of the liquid pumped, plus the velocity head at that point.

Answer / hameedwahab

NPSH - Net Positive Suction Head - It is an Algebric sum of all heads available at suction eye of an Impeller.

Answer / magesh

NPSH is nothing but Net Positive Suction Head.
The difference between actual pressure of a liquid and it's
vapour pressure at a given temperature

Answer / anand swami

net positive suction head NPSH can be defined as the excess
of inlet total head over the head equivalent to vapour
pressure of pumped liquid.


If water close to boiling point enters a pump, it is liable
to flash to steam at the low pressure area at the eye of the
pump impeller. If this happens, bubbles of steam are formed
as the pressure drops below the water vapour. When the
pressure rises again, these bubbles will collapse and water
flows into the resulting cavity at a very high velocity.

This is known as 'cavitation'; it is noisy and can seriously
damage the pump.

To avoid this problem, it is essential to provide the best
possible Net Positive Suction Head (NPSH) to the pump so
that the static pressure is as high as possible. This is
greatly aided by locating the feedtank as high as possible
above the boiler, and generously sizing the suction pipework
to the feedpump

What is a mechanism?

0 Answers  

What is the specific gravity or relative density of fuel oil?

0 Answers   RRB,

how exact reduced the work done by compressor by use of intercooler?

0 Answers  

what will happen if there is no expansion valve in the air conditioning system? is there any possiblities of working an AC system without expansion valve?

4 Answers  

whether a spehrical ballon rises faster or a cylindrical ballon?

10 Answers  

draw neat sketch of pirani gauge with wheatstone bridge circuit to measure output. discuss its construction working princple

0 Answers   Ksb,

What is the congressional space medal of honor?

0 Answers  

Which two elements have same percentage in proximate and ultimate analysis of coal?

0 Answers  

Why RPM cum hour meter connection is not possible in water cooled DEA set. Is there any problem in sensing?

0 Answers  

What will be the cause of high temperature in one cylinder of D/E?

1 Answers  

why petrol engine gives more power than diesel engine eventhough diesel engine has high compression ratio?

11 Answers   TATA,

What are the purposes of spiral gear in a purifier?

0 Answers   RRB,