#npsh video upload announcement #shorts #marinecartoon

It's awesome sir.

❤️❤️❤️🙏🏽🙏🏽

Thank you sir.
Helped a lot to clear complicated topic easily .

Sir first of all Thank you for posting informative videos. In this video you said that any pump cannot take suction more than 10 m, But usually the suction pipes on board are submerged just above the bottom of the tank . So my question is that in this case does the npsh gets affected??

Very informative. Thank you sir 😊

Very informative video sir, I want to ask that is advisable to throttle suction / delivery valve in order to adjust the pressure ? In our ship,I was TME, during the drydock , the cooling system for ac and refer condenser was changed from fresh water to sea water, so a new ac cooling sw pump was installed. The pump newly fitted did not had any bypass line to adjust the pressure like in fire pump, due to which the water pressure reaching the condenser could not be controlled effectively as during loaded Voyage the pressure inlet to condenser was around 2.5 bar and during ballast voyage this was around 1.8-1.9 bar.

So the 2E asked to adjust the pressure by shutting the overboard valve after the condenser outlet and sometimes by throttling the suction valve . The pump had been overhauled 2-3 times already within 50 days as some , there was a hole in the casing of pump created, and many times motor used to trip. Once, I felt that the temperature of water on the delivery side was too high. Looked as if boiling has taken place. Sir I want to also ask what pressure of water is required at the reffer condenser / Acc ac condeser so as to work efficiently ? Also when there was ice formation on evaporator or compressor of ac batti sab used to throttle the inlet valve to condenser. The old condenser of accommodation ac used to get a hole in tubes every alternate day and then after 20 days we had to go to Singapore for new ac condeser installation
Two condenser were fitted then. Could the damage of tubes been possible due to water pressure or due to condenser design for fresh water only ?

Uploade more video sir ....

Thank you sir

It was very clear explanation sir

Started enjoying your videos sir 😊....very good content and precise explanation

Well explained sir ... another master piece .... keep doing good work sir...

Nicely explained sir.
Can u make a video on balancing and vibration.

Sir on board all pumps are placed at the bottom most platform therefore the suction head for max no. Of pumps is way higher then the npsh required. But incase in my ship we had a sewage disch pump whose delivery pipe extends from the bottom platform (stbd side) till the second deck and from there it travels down to the bottom platform on the (port side) to get discharged ovbd.

Now most of the times the pump looses suction after sometimes after we prime the pump with freshwater. The pump body also gets hot because the water is not discharged ovbd and the impeller is just churning water and the pump is getting heated.
So my doubt is that wether npsh depends only due to the pipeline in the suction side or does the discharge side piping also effects the npsh of the pump.

Sir, please make videos on Boilers

thank you so much sir, keep up the good work

very useful video

Very nicely explained. Thanks sir.

Sir can you please make a video on control systems and their adjustment/ rectification. ( Jacket water controller on board )

Sir plz make video on pump characteristic in regards for class 4 exam

Sir one request, can you make a video on why axial piston pumps have odd numbers of piston not in even numbers

One video on boiler water test n all related information regarding boiler water treatment.

Thank you so much sir...❤️

if we fit the pump below water level, as most of the pump in e/r, is that in a kind helping avoid the problem with npsh ??

Well Explained Sir.

Sir,tnx for valueable videos,,,am appearing for cl2...ur informations r very very useful..,,which we can't find in any other notes what exactly it is

Started enjoying your videos sir 😊....very good content and precise explanation


Chief Engineers TeaTimeTalk | Marine Engineering

Reply

I have seen a centrifugal pump which takes suction (negative suction) below 10 mts level in my farm. Only thing is you have to flood the suction pipe....

Thanku sir

Hello sir. Nicely explained sir.

But I have a doubt ,If suction lift not more than 10 meter in height then how exactly in bore well we are able to pull water 200 ft below the earth surface while the centrifugal pump is kept on ground level itself. I am not talking about submersible pump. Thankyou sir.

Quality material.. thank you so much

What is in the case of emergency fire pump?? Suction lift more than 10 meters.

Sir how to prepare for GME

Wow. This is an excellent explanation! Thank you so much!

Presentation is great such that even a normal person can understand the concept. Great dedication✨️.

Thanks sir for your honest efforts behind such infirmative videos..

sir, you told a pump cannot therotically take suction from a depth of 10 meters below its impeller .then how can suck the water below its impeller of 10 meters.

Great work sir 👍

Thank you my friend

Thanks for super and simple explanation sir , kindly keep posting the video related to our field
If possible kindly post propeller curve video

Perfect videos for concepts

Really very practical explanation...Keep it up sir

After 7 years in maintenance of pumps i get to know that 10m is maximum suction head of any pump 😢

but how bore water pumps are getting suction ?the bores were digged around 40 feet ?!...normally in household they are using normal motors only

Theory well blended with practical onboard application.. Thats a CE sir.. ❤

Im wondering about the physics in everything and ur way of decoding it for us to understand is amazing sir ..