NET POSITIVE SUCTION HEAD ( NPSH ) | Explaination with derivation | Centrifugal pump 

Great! Very informative. Now clear the actual point of view of NPSH. Thanks a lot from Bangladesh.

It is v²/2g in Bernoulli's equation.

superb explanation till now I have searched more than 15 websites, 10 youtube channels, unacademy, McCabe smith and cengel also. But your explanation made the concept clear

Excellent explanation! This is very much appreciated.

Respected sir I think velocity head will be 2g in denominator 👍

Great explanation. I have searched many videos and channels, but did not find such a lecture. Thanks bro

Short and simple yet efficient. Thank you.

why have you added v2/2g with the NPSH last formula after explaining it's justthe difference between suction pressure head and vapour pressure head. Didn't get you there. kindly respond

Well explained in a simple manner.thank you.

Excellent explanation! THANK YOU!

Many thanks for such an amazing clarification!

Very helpful video .....please make more conceptual videos like this . All doubts cleared thank you....

Cavitation does not occur due to liquid to vapor formation. It happenes when pressure increases again and vapor again try to be in liquid phase. These liquid collapse and implode into the metal surface and cause the erode to the metal surface.

Sir concept bht sahi. Clear ho gya.. really sir...no words for u... thanks a lot sir..

Sir kya bolun yr u r ossom in many ways sir God bless u sala aajtak mujhe SMjh nhi aya par today only because of u

Best explanation sir👌

Good job ..love frm nepal...

Nicely explained Sir!! Kindly post a video solving a problem related to finding the size of prime mover of pump.

good explanation. good job

oh brother, you did really awsome thing!!

U r great sir lots of love to u

Once you have taken v^2/2g at suction then why you use again adding v^2/2g in PV/$g

Thank you sir for better explanation, what is the difference between limiting height of suction height and NPSH ??

You're all videos are very helpful if possible add the last topic which is remaining named as characteristics curves of it. Thanks a tonne of lot

Very well explained!!

Excellent. , knowledgeable

Hi Sir, could you explain the NPSH for Vertical Suspended Pumps (VS4/ VS5). NPSHA calculation and checking the vendor datasheet/GA from customer point of view.

I think the velocity head term in the final equation can be omitted because NPSH is determined, like you say, by the condition that point 2 is at vapor pressure so cavitation is about to occur. If cavitation is happening, v2 goes to 0.

Clearly explained sirrr thank you ❤

very nice explanation

Wow nice explanation👏

Hello Sir, Do we need to add atmospheric pressure to the pressure in the manometer at the suction while considering NPSH?

Plz do make videos on other subjects of Mechanical engineering too!!!

Good explanation. Plz explain NPSH in steam turbines .😁

Excellent video sir.

Why V^2/2g is added please explain any one it will be so kind of y please

Good explanation sir❤️❤️

If vapour pressure of particular liquid more than the suction head pressure then what will be done.

Is too much npsh available good For e.g npsh required=10ft and npsh available=100ft Pls reply

Thanks a lot...💓

Please can you explain with real life example means I have a pump delivering fluid at some rate. I want to understand how can we say that the pump is under cavitation or not. request to respond

The term hs may varies with -ve or +ve sign?

Good explanation sir

Very well said

Good and clear explanation

How to calculate NPSH, if sump level is above the impeller eye

thank you

thanks for the video

Good explanation tq

Sir final eq me to v2^2 / 2g cancel ho ja ra h ...And final ek k ek step pahle v2^2 / 2g ko kyu add kiye wo samajh ni aaya ache se

SHORT AND SIMPLE

Clear explanation

Thank you sir

Xcellent

V2÷2g not v2÷¶g

please explain for positive suction as you explained for negative suction

Hi, is this npsh r or npsh a

nice sir

Sir.. In Bernoulli equation... It should be v² /2g

Thank you

vapor pressure at any given temperature is defined as the pressure exerted by the vapour in equilibrium with the liquid at that temperature ....then how it becomes the pressure at which liquid convert to water vapour..

How you avoid the cavitation, by changing the static head or the pump location ?

Why have you not considered z2 in final NPSH formula....? Why only velocity head ?

Thanxx

Why do we add the velocity term in NPSH?

Sir final value mein v2^2÷2g cut zaayegaa naa?

What about positive section

💕💕💕💕

I have a sump that’s is above the pump existing NPH is 22 can I replace it with 18 ft?

sirji Bernoulli's equation to theek likho yr!

How much is v2

Useful video. But made a mistake in the equation and corrected at the end. Should be more careful while writing equations.

It's V2/2g.

Your explanation is incorrect. NPSH is defined as the Absolute STAGNATION Pressure head at the pump suction minus the absolute vapor pressure head. You are all over the place but it appears you are making the (unfortunate) common mistake of defining it as the absolute STATIC pressure head at the pump suction minus the absolute vapor pressure head. It is wrong in Mark's handbook (at least my edition) if that was your reference. I recommend going to the Pump's Handbook or any good undergraduate text for a correct understanding of NPSH. You can also call a pump manufacturer, they love to discuss this stuff.

In book static head is added in the formula.But you didn't add

Below

V2/2G....THATS KINETIC HEAD

V2/2g not row.g

Impeller ko fig. Wrong hai

how to determine NPSH 3% or what we say NPSHR and what should be the NPSH margin ratio for pumps watch this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-L_kAv0wpST8.html

Cavitation creates more problem for impeller than the suction pipe..there will be more wear and tear of impeller and more noise too .

You are факing инdus

Pv √ not ¶v ×

Plz make videos only when you know the concept very well. Don't make it just for the sake of making. Complete wastage of time.

v.bad teacher