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

[@avskr-04]

It is v²/2g in Bernoulli's equation.

[@ashu3517]

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

[@dankshavalishaik3313]

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

[@offtrail1062]

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

[@quicksilva184]

Excellent explanation! This is very much appreciated.

[@devakshay8]

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

[@bat_man1138]

Same doubt if anyone know it please respond

[@sohrabhossain6493]

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

[@ichigokurosaki7699]

Short and simple yet efficient. Thank you.

[@woodah08]

Excellent explanation! THANK YOU!

[@hashimnazir9221]

Well explained in a simple manner.thank you.

[@majedaljaber134]

Many thanks for such an amazing clarification!

[@vaibhavverma6426]

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

[@manishkumar-gk3it]

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

[@Sumitkumar-bb8uh]

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

[@Rajeshroy-C]

Good job ..love frm nepal...

[@samadmaniyar4322]

Best explanation sir👌

[@ShaifulislamMajumder]

oh brother, you did really awsome thing!!

[@manishkumar-gk3it]

U r great sir lots of love to u

[@Lahari5093]

good explanation. good job

[@AnkitGupta-ck9po]

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.

[@dileeppaswan231]

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

[@nilban372]

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

[@Farhan74100]

Excellent. , knowledgeable

[@atishtambe5898]

Very well explained!!

[@kameshnathan9095]

Clearly explained sirrr thank you ❤

[@jramanji2072]

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

[@bat_man1138]

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

[@CC-gv6us]

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.

[@sumantrachat1969]

Absolutely.

[@satayutravadi]

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

[@Pradeepgk17]

Wow nice explanation👏

[@raiannurislam]

very nice explanation

[@toufikzisan1064]

Excellent video sir.

[@rajprabhakar06]

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.

[@nayanmehta5061]

V2÷2g not v2÷¶g

[@nikilmahi6834]

In final step he corrected bro

[@aslam1092]

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

[@srinuk8636]

Good explanation sir❤️❤️

[@mahabubalam8496]

Thanks a lot...💓

[@naumanashraf8012]

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

[@sandeepfuleri_vlogs]

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

[@arunraj7816]

Good explanation. Plz explain NPSH in steam turbines .😁

[@dalcap13]

Good and clear explanation

[@shivaniarts3435]

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

[@suhukv]

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..

[@abishekmurugesan335]

Very well said

[@kirtanadhvaryu]

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

[@silambarasanp1555]

Good explanation sir

[@abhishektiwari-nk1lp]

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

[@DipankarDeori]

at the beginning, velocity of the liquid is termed as v2, later v2 is velocity of the impeller

[@mechtrotip5034]

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

[@annappakrishnashet2364]

Good explanation tq

[@ranjithpn9261]

SHORT AND SIMPLE

[@biswarupdas14]

thanks for the video

[@satyaranjansahoo1641]

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

[@aakashmohan5703]

Clear explanation

[@rameezsharif9482]

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

[@user-wb8gv7bd3f]

please explain for positive suction as you explained for negative suction

[@maheenshakil5828]

Why do we add the velocity term in NPSH?

[@biggerboss6988]

Xcellent

[@marshalldteach4814]

thank you

[@tejasmahajan6641]

Thank you sir

[@ramsubu6657]

Hi, is this npsh r or npsh a

[@hussainshaheed4502]

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

[@na1ab000]

you cannot relocate pump when it is already installed. you can increase liquid level to increase NPSHa to avoid cavitation. when you are designing a pump for new plant then you have a choice to relocate pump to increase inlet head.

[@parthbhavsar1535]

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

[@ShaifulislamMajumder]

z2 goes to Hs

[@ananthavishnumheman3067]

Thank you

[@kunal-eq3bl]

💕💕💕💕

[@chinnaappalanaidumalla7954]

What about positive section

[@10ran]

nice sir

[@simonjawhari]

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

[@simonjawhari]

NPSH

[@eim-r8way322]

Thanxx

[@anubhavkumartiwary8417]

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

[@anubhavkumartiwary8417]

Reply sir?

[@morshedulislam5639]

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

[@gcsindia528]

How much is v2

[@mukherjeejoy1747]

It's V2/2g.

[@prashantsolanki6879]

sirji Bernoulli's equation to theek likho yr!

[@Obama2024]

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.

[@kirankv47]

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

[@josephff6893]

V2/2g not row.g

[@anupmandal3939]

Impeller ko fig. Wrong hai

[@sajith303]

V2/2G....THATS KINETIC HEAD

[@ABHISHEKSINGH-gu7ij]

Below

[@theseedspeak]

how to determine NPSH 3% or what we say NPSHR and what should be the NPSH margin ratio for pumps watch this kzbin.info/www/bejne/gpDOcqlmrNWGipo

[@sanjugohil]

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

[@romanwest5764]

You are факing инdus

[@ShriRam_1122]

Pv √ not ¶v ×

[@moazsalem3488]

v.bad teacher

[@samdgreat4792]

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.