Interested to Buy Any Domain ? << Click Here >> for more details...
NPSH for centrifugal pump
- 8 Answers
- 11516 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
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.
| Is This Answer Correct ? | 18 Yes | 0 No |
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.
| Is This Answer Correct ? | 9 Yes | 1 No |
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.
| Is This Answer Correct ? | 6 Yes | 2 No |
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
| Is This Answer Correct ? | 5 Yes | 1 No |
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
| Is This Answer Correct ? | 1 Yes | 0 No |
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 !!
| Is This Answer Correct ? | 1 Yes | 1 No |
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
| Is This Answer Correct ? | 0 Yes | 0 No |
a three phase squirrel cage induction motor runs slow? list all possible reasons for such fault.
What are the effects of carbon on the properties of steel?
what is the responsibility of production department ?
Compare the working principle of gas turbine of capacity more than 10megaW, diesel generator and wind turbine
The fatigue life of a part can be improved by ?
How do we calibrate the pressure transducer on the disharge line above our compressors? Or should it need calibrating?
what is the surge tank ?in the pump station.(surge tank by pipe connected to discharge line)
Is cnc operating experience is must for successful career in cad/cam?How to make salary jump in this field of cad/cam?
How can the reaction of support of a frame be evaluated?
State fourier’s law of conduction.
Bearing no : 6402 what is the ID ,OD,width
what is alignment of two shafts and procedure and how we have to give the correction for misalignment
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
