Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / 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
| Is This Answer Correct ? | 2 Yes | 2 No |
Post New Answer View All Answers
What are the uses of windmill?
What is hess law?
THIS IS HARI PRASAD. I KNOW THAT HVAC MEANS HEATING VENTILATION & AIR- CONDITIONING. I NEED DESIGN CONSIDERATION OF HVAC UNIT.
How do you detect starting valve leaks?
Explain important rules that must be kept in mind while designing castings?
what is sight glass, water level meter, water level indicator, level control probe?
Hi i am riyaz ahmed . i got rejected for first time and i nedd to apply for next time and can i apply in 1 or 2 week . and wt abt my sevies fee ? i should make a new once shill i go with the same and wt docement i should change can u plz help me out and my mail it is royalriyaz@gmail.com
as started in the job offer notification, is our basic salary of 1lakh good for you if employed?
Quantities like pressure, temperature, density, viscosity, etc. Are independent of mass. What are these called ?
why does polytropic efficiency of a compressor decrease with increasing flow rate ?
Discuss various surface finishing processes?
Explain difference between fissile and fertile materials?
in the design of a rack and pinion with the pinion having a pitch of 4in and a teeth number of 45,how many teeth should a rack of length 196.850in have
What is the detailed meaning of automotive clutch endurance test and inertia test?
On which analysis is based the dulong’s formula for the heating value of fuel ?
