Centrifugal Pumps and Mechanical Seals

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Centrifugal Pumps and Mechanical Seals - Maintenance and Theory

Рет қаралды 119,535

2 жыл бұрын

The Shrimp to Shark is back sharing a small video about Centrifugal pumps and mechanical seals!
Centrifugal pumps are critical in so many systems in the engine room! Therefore all engine cadets and engineers will work on them!
Its good to have theory and curiosity on how they work therefore lets work together to change the mechanical seal on a leaking pump, and learn some things while doing it.
Success and nothing else my friends I hope to share more of my life at sea little by little (Im working on a cruise ship now!)
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Success and nothing else

Пікірлер: 180

@Mark-cr7rg 2 жыл бұрын

Fantastic instruction and demonstration. You pace these videos very deliberately, which is rare and valuable to the viewer. Brings back great memories of the most rewarding career I ever had. Thanks Rafael!

@ShrimptoShark 2 жыл бұрын

My brother Mark! Thank you for such a kind comment of course lots of care is put in each video. I'm glad to bring back wonderful moments at sea! Rock on brother

@Joakri8 2 жыл бұрын

Very good video, informative and helpful, cheers from a Norwegian Marine Engineer 😊

@ShrimptoShark 2 жыл бұрын

Thank you for the support Joakim, awesome to see seafarers all the way from Norway haha! Kind comments like yours are amazing! Success and nothing else my friend.

@josephamati8572 Жыл бұрын

Hello Kristiansen, I will be relocating to Norway in a few months time and I am a seafarer. Would you like us to share WhatsApp contacts? Thank you

@user-qd7xf3oh3q Жыл бұрын

I just want to thank you for all your videos , they are extremely helpful and informative , please never stop you have helped me a lot

@ShrimptoShark Жыл бұрын

You are very welcome and I am very happy to see that you liked them!

@joebertolandra6953 Жыл бұрын

im surprise that your engineer let you overhaul a centrifugal pump as a cadete they really have trust in you, hope that every senior engineers have the same as your engineers thanks for the very informative video

@ShrimptoShark Жыл бұрын

Its not easy but with determination we can learn in all situations..of course support is always good, I was very lucky as a cadet.

@mirenmorker1476 5 ай бұрын

Very helpful video

@dmurray2978 Жыл бұрын

Best explanation of mechanical seals I've seen

@ShrimptoShark Жыл бұрын

That makes me happy to read..thank you

@samuelschultz1760 Жыл бұрын

Excelente explicación paisano!! Cada día representando a nuestro país con talento!!

@ShrimptoShark Жыл бұрын

Agradecido amigo, siempre exito colega

@denizcracoglu6739 Жыл бұрын

You have a perfect knowledge for your rank and have extraordinary teaching skills keep up the good job and thanks for the contrubition to all the seafarers

@ShrimptoShark Жыл бұрын

I appreciate that! success and nothing else deniz, thank you

@TheeAceSiDeAL 10 ай бұрын

As I’ve noticed the auxiliary pipe is coming from inlet to the gland, the fluid that goes inside the pump is water so that means this API 13 mechanical seal the water goes from the gland to pump suction and not vice versa. Thanks for the video and the explanation.

@ShrimptoShark 10 ай бұрын

Aye that is correct, as I grow in knowledge I start to view these things easier than back then. It's true the suction pressure is lower than that inside the gland (since it received pressure energy from the impeller) therefore fluids will always go to lower pressure. As you say the flow will be from the gland to the tube and back to the suction creating a recirculation with new water each time.

@makinista2541 2 жыл бұрын

Awesome video. very informative to all aspiring marine engineer. Thank you and god bless.

@ShrimptoShark 2 жыл бұрын

God bless my brother thank you very much!

@SHUBHAM-KEENOO1 5 сағат бұрын

EXCELLENT JOB EXCELLENT VIDEO GOD BLESS YOU, SIR

@pierrereneerkens7671 11 ай бұрын

The centrifugal pump is an ingenious piece of technology that many people do not think about, it is different from a positive displacement pump. by turning the impeller, the product becomes weightless in the center point, the air pressure ensures that the product "in this case water" is pumped. The problem with a centrifugal pump is that it can only pump up about 8 meters. If you put the pump on a mountain, it will become even less because the air pressure there is lower than in a valley. This is what they taught me about it , impressive.

@ShrimptoShark 11 ай бұрын

Aye my friend, the marvels of engineering and how stuff works is a deep hole that once you go in it's difficult to come out 😂. They are also multistage centrifugal pumps which can raise pressures to very high levels which can overcome many meters of height. In cruise ships for example we have 18 bar pumps that can go up to 16 decks of height (which is about 45meters).

@pierrereneerkens7671 11 ай бұрын

@@ShrimptoShark 45m impressive. I myself work in the paper industry if you like technology this factory is a playground. Here no multi-stage centrifugal pumps are used, but ordinary centrifugal pumps are used and many types of positive displacement pumps, especially worm pumps.

@ngocthienho1009 Жыл бұрын

Many videos are represented clearly and interested. It support to me understanding more knowledges. Now, I am engine cadet and thank you to make video.

@ShrimptoShark Жыл бұрын

I hope you are always learning and growing my friend.

@frank6048 8 ай бұрын

El compa de OpenEnglish despues de finalmente tomar el curso de ingles. Saludos, bastante útil para saciar mi curiosidad, gracias por este excelente recurso.

@ShrimptoShark 8 ай бұрын

Hahaha el inglés abre muchas puertas y caminos.. Esta me llevo al mar. Feliz de despertar curiosidad

@1vygail 2 жыл бұрын

long awaited new video sir. thank you 🙂

@ShrimptoShark 2 жыл бұрын

No problem success and nothing else! 🤗

@mikel3670 6 ай бұрын

Great video! Thanks for taking the time to make it!

@ShrimptoShark 6 ай бұрын

It's my pleasure and happiness to see that the video is useful.

@jjlm218 Жыл бұрын

Excelente colega me encanta la forma que explicas estoy en mis exámenes de titulación y algunas cosas que hice en mi año de práctica las olvidé y tú me ayudaste a desempolvarme !

@ShrimptoShark Жыл бұрын

Exito colega, el aprendizaje y refrescamiento es importante, me alegra que esto sirva para afilar el conocimiento previo.

@wahidnurrohman8675 5 ай бұрын

Exellent explanation, keep up the good work Sir. Good Job

@ShrimptoShark 5 ай бұрын

Thank you, I will try my best to continue even in my new environment cruise ships.

@humby123 4 ай бұрын

The hardest part for me is working with people who have done this hundreds of time before. Since I don't want to slow the job down, I have to try to capture as much as I can with the little time I am able to ovserve individual steps. This is and will continue to be a painful journey but I hope it eventually becomes easier.

@ShrimptoShark 3 ай бұрын

It gets easier each time but there are so many types of mechanical seals for different pumps. We get to see most of then onboard in various sizes. Success and nothing else

@toroitichpatrickyegon4866 Жыл бұрын

This is beautifully presented. I need to up my presentations this far

@ShrimptoShark Жыл бұрын

Success my friend, I hope you are always able to share your stories.

@user-oz5xg7ww8f 9 ай бұрын

VERY CLEAR AND HELPFUL

@ShrimptoShark 9 ай бұрын

Thank you, I appreciate your kind comment amigo.

@user-sr5gs5js8h Жыл бұрын

Your explaining and working are very useful

@ShrimptoShark Жыл бұрын

Thank you amigo, i appreciate it.

@joscis5870 2 жыл бұрын

Thank you for sharing this knowledge.

@ShrimptoShark 2 жыл бұрын

Knowledge should always be shared success and nothing else!

@CER656 Жыл бұрын

Very well explained thank you

@ShrimptoShark Жыл бұрын

Thank you

@rutebemberwajoshua6900 5 ай бұрын

Straightforward. Thank you boss

@ShrimptoShark 5 ай бұрын

Thank you, it's my goal to make these complex things sweet and simple.

@chrisleon27 Жыл бұрын

Hello from China ,ur talk is quite stabilized and slow motio~ed ,it's quite a unique style

@ShrimptoShark Жыл бұрын

Hahah thank you Chris! Ive heard of that before

@zulhairyzainal1674 4 ай бұрын

Very Good Information bro...very informative and good demonstration..

@zulhairyzainal1674 4 ай бұрын

Next week i will be Traning Engineer on board....hope can be like you

@ShrimptoShark 3 ай бұрын

With curiosity and hard work you will make it don't worry it's a good job.

@sudhakarcvcv1776 4 ай бұрын

Very nice explanation of topic

@ShrimptoShark 3 ай бұрын

I'm glad it was of use amigo

@lionsofafrica5867 Жыл бұрын

Çok teşekkürler. Faydalı bir video olmuş. İyi çalışmalar diliyorum.

@ShrimptoShark Жыл бұрын

Thank you my friend

@amicheal1405 2 жыл бұрын

Very usefull. Pls do more videos like this

@ShrimptoShark 2 жыл бұрын

I'd be glad to continue sharing maritime engineering. It's a very fun project. Thank you for saying that they are useful 🤗

@NathanNew-qb8cg 4 ай бұрын

Great job 👏

@ShrimptoShark 3 ай бұрын

Thank you brother

@jayallen426 8 ай бұрын

Great video.

@ShrimptoShark 8 ай бұрын

Glad you enjoyed it amigo.

@saveelfayas7741 2 жыл бұрын

Very informative. Expecting more videos

@ShrimptoShark 2 жыл бұрын

Sure step by step, thanks for the support!

@uncommonusername2507 Жыл бұрын

awesome instructions..

@ShrimptoShark Жыл бұрын

Thank you very much, I appreciate it.

@brightonskiyi3769 10 ай бұрын

Super good I will subscribe

@ShrimptoShark 10 ай бұрын

I appreciate it! Thank you for your support

@emacflores7914 10 ай бұрын

Great video bud!

@ShrimptoShark 10 ай бұрын

Thank you very mucho amigo

@rezahezkia7019 7 ай бұрын

Thankyou for your information Sir

@ShrimptoShark 6 ай бұрын

Thank you for your support

@Eternal_Sailor 4 ай бұрын

Superb bro

@ShrimptoShark 3 ай бұрын

Thanks 🤗

@ashutoshrai2970 2 ай бұрын

How do we ensure that gap between both the stationary and rotating part of mechanical seal.? Please tell

@chrischan256 9 ай бұрын

thank you Sir

@ShrimptoShark 9 ай бұрын

Most welcome buddy

@Bbala5079 11 күн бұрын

Thnks u so much brother

@kryptonian1371 7 ай бұрын

brilliant

@ShrimptoShark 6 ай бұрын

Thank you for believing that

@olaola5889 Жыл бұрын

agradezco enormemente los subtitulos en español, muy amable!

@ShrimptoShark Жыл бұрын

no hay problema, me alegro que pueda ayudar a mis paisanos

@josearniella8015 Жыл бұрын

Realmente te quedó muy bueno el vídeo!, 👍

@ShrimptoShark Жыл бұрын

Agradecido jose, exitos siempre amigo.

@kvong615 Жыл бұрын

Thankyou!!! Great video

@ShrimptoShark Жыл бұрын

Thank you for the kind comment

@kamarulnizam6882 Ай бұрын

thanks man

@MenMarblogs 9 ай бұрын

Thankyou so much more videos ❤❤❤

@ShrimptoShark 9 ай бұрын

For sure, every time I can share something I will 🤗

@DMT4Dinner Жыл бұрын

Wholesome

@johnsnow9224 8 ай бұрын

Is there any way to take wearing clearance without dismantling the pump? Usually we take it after dismantling, right. Like id of casing ring - od of mouth ring by 2.

@ShrimptoShark 8 ай бұрын

If you are talking about the wear rings, I'm not sure if there is a way to check clearance without removing the volute casing.. You need the shaft OD and the ID of wear ring to see clearance.. If it is over tolerance shown in the manual then you need to put a new wear ring, if with a new ring it still won't allow then you need to replace the shaft.

@johnsnow9224 8 ай бұрын

@@ShrimptoShark i found a video of taking clearance using feeler gauge,in this case he's not opening the casing. But this is not of onboard pump. Is this method possible with our all onboard pumps also? Please find the link of the mentioned video(language is something else) kzfaq.info/get/bejne/iMd0qauq0J6wf3U.htmlfeature=shared

@jocosabyahe3230 Жыл бұрын

More power :) solid video waiting for another video :) #shrimpmates #sharkmates

@ShrimptoShark Жыл бұрын

Jocooooooooo, success buddy, thank you for helping me in a wonderful contract on the Carnival Dream, I hope you are well.

@aneesharis4661 Жыл бұрын

Very helpful sir

@ShrimptoShark Жыл бұрын

Heya bro! Im glad it could be of use, thank you for the support.

@gonzalomonsalve3764 8 ай бұрын

sauldos amigo me encuentro en canada y una empresa me esta dando la posibilidad de aprender este trabajo de reparar y testar bombas de petroleo entiendo que es lo mismo? para mi este rubro es nuevo.. la empresa se dedica a la mantencion y testeo de bombas este video me viene de gran ayuda espero aprender lo mas rapido posible es una gran oportunidad..

@ShrimptoShark 8 ай бұрын

Hay muchos tipos de bombas. Estas son centrifugas y en algunos lados lo usan para descargar petróleo con turbinas (buques de crudo), pero en general para líquido viscosos como petróleo se usan bombas de desplazamiento positivo (tornillo, pistón, lóbulo, etc).

@venkannabandhu467 Жыл бұрын

Very good video

@ShrimptoShark Жыл бұрын

Thank you

@francisregis3804 Жыл бұрын

This pump have bearing or not. If have where is this? If don't have how is this?

@ShrimptoShark Жыл бұрын

The pump side has no ball / roller bearings however the wear ring I showed in the start is a sort of bearing (sacrificial peice) which keeps the shaft centered. There are two the one in the front (shown) and one in the back in the pump casing.

@user-unji5h2k3nw69 Жыл бұрын

good

@joshuap7396 Жыл бұрын

Im confused why the stationary and rotating cant touch each other.When assembly What if you instlled them touching each other in the first place?

@ShrimptoShark Жыл бұрын

If the surfaces touch then there will be increased wear, ideally the small gap is sealed and lubricated by the perpendicular flow. If they touch of course they will seal however they will have lower life.

@orchard75 Жыл бұрын

Hello I want to install a water pump inside my house, can i put it inside a sound insulated box to contol the noise?

@ShrimptoShark Жыл бұрын

Depends on the area and surroundings, however a box covering the pump usually wont be a problem as long as you can access it later for maintenance as well as no obstrucions on the pipe lines.

@mirmuhib2849 Жыл бұрын

In some pumps there is an additional stuffing box between motor and pump. Are mechanical seals also used there or gland ropes?

@ShrimptoShark Жыл бұрын

Some very high pressure/torque pumps like boiler water circulation/feed pumps (which must overcome the preussure of the boiler inside) generally use mechanical seals and have an oil box that we must keep topped up and renewed after certain hours. The glad rope you refer to is called packing. Which we cut various rope like pieces and "stuff" between the back of the volute casing and the shaft in an area we call the gland seal. They have lower working life than mechanical seals because they wear little by little because of friction however they are very simple to replace.

@robertdascalu5498 2 жыл бұрын

One of the questions I was wondering myself for a long time thanks a lot, by the way when will you finish your cadetship ?

@ShrimptoShark Жыл бұрын

Sorry for the late reply, I am actually already a 3rd Engineer on a Cruise ship now haha time flies.

@celiscyrus2621 2 жыл бұрын

Thank you sir !!!

@ShrimptoShark 2 жыл бұрын

Success my friend!

@Insaniyat_2793 2 жыл бұрын

After long time ur making video... ✌🎉

@ShrimptoShark 2 жыл бұрын

Yeahh I got the urge to upload something haha 🤗

@Richard28012009 10 ай бұрын

Excelente

@ShrimptoShark 10 ай бұрын

Agradecido por su apoyo

@apoorvbharadwaj7156 2 жыл бұрын

How will we make sure that the gap between the stationary part and the rotating part is appropriate? Is there any way to measure is or we just assume it as per the amount of leakage or the previous marked position of the seal retainer?

@ShrimptoShark 2 жыл бұрын

The spring on the rotating side will expand with the force of the water flowing and it will push it the rotating seal to the stationary seal side.. The liquid seal will maintain a small distance between them. Remember that when you put a new seal the bolts that clamp the gland seal are not tightened fully.. When you run the pump if you don't see any leaks (because spring and seals are new) you leave like that if you do see leaks you gradually tighten.

@abrahamromero6670 2 жыл бұрын

Pretty Nice 😁

@ShrimptoShark 2 жыл бұрын

Thank you my brother 🤗

@harmeet094 2 жыл бұрын

The faces do come in contact with each other, how else they are going to seal ?

@ShrimptoShark 2 жыл бұрын

No, the water flowing towards the gland pushes the mobile seal (it has a spring) back slightly.. And the stationary seal obviously is static. It's a veryyyyy small gap that is then sealed by the liquid lubricating seal you can see in the video.

@harmeet094 2 жыл бұрын

@@ShrimptoShark noo brother, the spring is their to keep pressing the seal faces with each other. Water is there only for cooling purposes. If the water is going inbetween the seal faces, then what's stopping that water from going out through inside part of stationary seal? These two faces must always have a positive contact with each other, but should ne be too much pressed against each other to avoid early weardown of seal.

@ShrimptoShark 2 жыл бұрын

I disagree, there is a very small clearance between the faces and while the liquid line serves its purpose of cooling it is directed in a way that prevents the flow from leaving this small gap. I'm not saying that the faces NEVER come in contact, they do and because of this they wear, but their design is to create this small clearance. What you say about the spring is also true.. There are forces acting on both sides however.

@harmeet094 2 жыл бұрын

@@ShrimptoShark Brother I understand your point, but the thing you are talking about is not a clearance. While installing a mechanical seal, it is made sure that two faces are in contact with each other, but should not be forcing on each other too much. The water pressure from cooling water line automatically creates a very fine gap(even smaller than hairline) in between primary sealing faces which kind of acts as a lubricant for the faces. But it is not a clearance. Because if its a clearance left while installing, then two faces will never meet each other and it will never seal. kzfaq.info/get/bejne/lcWnpMZirMzSink.html I hope this video will clarify it :)

@verygoodbrother 4 ай бұрын

Wait, asbestos gaskets are still used?

@ShrimptoShark 3 ай бұрын

It's true that they should be avoided but youd be surprised in the stuff that some ships use. It all depends on the quality of materials your provider gives.

@billyphyo5361 2 жыл бұрын

I am studying for engineer of watch exam. Your videos do help me. Ready for your next videos bro

@ShrimptoShark 2 жыл бұрын

That's the idea my friend. Success and nothing else in becoming a great engineer 💡👍🏾

@David-zu7cg 2 жыл бұрын

Sir, i am also 4 th engineer currently on board. Here purifier is not producing sufficient fuel to run the engine. What could be the reason .

@harmeet094 2 жыл бұрын

Increase feed, check the bypass valve of feed pump if feed is not increasing.

@ShrimptoShark 2 жыл бұрын

Well David it could be a number of reasons, you should diagnose and troubleshoot for example is the fuel consumption usually high?, it's the back pressure on the purifier correct, if you increase output to the purifier by the feed pump there will be more back pressure unless you open more the outlet to service tank. Is some flow going to the pneumatic three way valve? Back to the settling tank

@tylerammons517 Жыл бұрын

So making a asbestos gasket without using gloves or a mask?

@ShrimptoShark Жыл бұрын

Yeah PPE is very important, you have a point.

@onuryldrm3508 Жыл бұрын

Also using it on hot water pump... isnt asbestos carcinogen and banned from vessels?

@ShrimptoShark Жыл бұрын

Not at all.. It's still widely used at sea and at shore. If you work in this field and do a quick search online you can learn the status of this, they are called asbestos gaskets however the amount in then has been greatly reduced.

@pukkalamadhu1708 Жыл бұрын

U r fucking amazing enginer bro

@ShrimptoShark Жыл бұрын

😂Lots of room for improvement but it's a never ending battle, thank you brother

@user-bg1eh1xs2c 7 ай бұрын

Hai

@sudhakarsolomonnakka Жыл бұрын

Very good sir step by step watch and learn ...sir can you make one video for centrifugal oil pump 🙏🏽 help full for oil and gas plants interviews thank u

@sheesh1706 Жыл бұрын

Bro. 🤦

@ShrimptoShark Жыл бұрын

Ive worked on those cargo discharge pumps FRAMO, its basically a submerged and multistage centrifugal pump however to maintain it is hard work.

@debiprasadsamal8638 2 жыл бұрын

Make more videos of installing mechanical seal

@ShrimptoShark 2 жыл бұрын

Really? What else would need to be covered? I could make small clips but I think the theory is good enough in this video

@debiprasadsamal8638 2 жыл бұрын

@@ShrimptoShark small clips sounds good brother

@ashishmishra2144 9 ай бұрын

@@debiprasadsamal8638small clip never sound good. Deatiales Explained is always helpful and as Engineer , don't go on small. Learn to see and understand big picture

@jidendrap3745 Жыл бұрын

👍👍

@kingshukchowdhury898 Жыл бұрын

Why did you stop videos?

@ShrimptoShark Жыл бұрын

I didnt stop, its a long term project, with more experience and time it gets easier

@alfonsojuniorjimenezrossi8228 Жыл бұрын

And no have bearings?

@ShrimptoShark Жыл бұрын

The wear rings are a type of bearing, the ball bearings however are in the electric motor side.

@amitsinha6572 Жыл бұрын

What is your current rank ?

@ShrimptoShark Жыл бұрын

I am a 3rd engineer Sr. at the moment

@alexmaccity Ай бұрын

2-3 drips a minute is gooch

@apollomorella7324 8 ай бұрын

Dalhin mo ke anton, sandali lang yan

@mjsjamaica 8 ай бұрын

Need Safety Glasses. I am surprised the company allows you to work on rotating equipment without the correct PPE.

@ShrimptoShark 8 ай бұрын

I won't deny the importance of PPE. Thanks the for comment and your opinion

@pierrereneerkens7671 11 ай бұрын

asbest? This is not alloud overhere... hamering on asbest whitout protection, this is crazy man.. At least protect yourself whit a mask. Over here only working on asbest whit a full airmask. and even that is not alloud. when you see asbest you must stop work and there wil com a special firm to clean is al.

@ShrimptoShark 11 ай бұрын

I understand what you mean and yes if you work with asbestos gaskets everyday you should definitely wear protection. However onboard ships it is still commonly used and the danger is The cutting of the material and breathing in

@pierrereneerkens7671 11 ай бұрын

@@ShrimptoShark please take care, it can take over 40 years before you could get peritoneal cancer. I not saying you wil, bud the chances are bigger when you used it, its scary stuff. That why, although asbestos is perfect stuff for many purposes, it is forbidden here.

@ElMarinero77 Жыл бұрын

ussr patch? wtf😂

@ShrimptoShark Жыл бұрын

Haha it was a gift from my old boss, and has a lot of meaning to me. I was actually born near this time

@ashishmishra2144 9 ай бұрын

Where does cooling water will go after coming between face of rotating seal and stationary seal ?

@ShrimptoShark 9 ай бұрын

The liquid lubricating seal is recirculated from the gland seal to the pump suction and then back to the seal. (it can be a bit confusing because the arrows in my diagram show from suction to seal but it's backwards). Fluid enters the suction side goes through the seal and out the connection back to the suction, and new water is constantly coming in from the suction side to avoid heating.

@ashishmishra2144 9 ай бұрын

@@ShrimptoShark the new water which is going to gland is suction water or discharge water ?

@ShrimptoShark 9 ай бұрын

@@ashishmishra2144 depends on the instalation however the one in the video is on the suction side.

@ashishmishra2144 9 ай бұрын

@@ShrimptoShark okay I understood now. Thanks for answering with much love to you.

@ashishmishra2144 9 ай бұрын

@@ShrimptoShark Can you please make dedicated video on incinerator working as practical in depth showing each thing and explaining how to adjust temperature in incinerator and how to start/ stop, importance of blower etc?