Your video was incredibly helpful, thank you! I’d like to propose a slight clarification @2:21 mark. The reason pump manufacturers use meters of water (head) instead of direct pressure is not because pumps can produce different pressures but the same head when different fluids are pumped. In fact, it’s quite the opposite. Pump performance curves feature ‘head’ instead of ‘pressure’ because the maximum head to which water can be pushed is more practically meaningful for customer needs than pressure figures in bars or megapascals. Pumps do not push different fluids to a constant maximum head. For instance, lighter fluids such as petroleum can be pumped to higher heads than heavier fluids like mercury. To illustrate, a pump with a maximum head of 60m (of water) can support a 60-meter column of water, but only a 4.4m column of mercury, given that mercury is approximately 13 times heavier than water. However, the maximum pressure in bars will be the same for both cases. I hope this clarification is helpful!
You're wrong about that. The head will be the same for all different density fluids in a centrifugal pump. The horsepower will vary as well as the discharge pressure in kpa/psi. The viscosity however will change the fluid head of a particular centrifugal pump.
No one can explain better than you. Please make a video on how to size compressors for HVAC and how do we do retrofit and what are the advantage and disadvantage. I am definitely donating !!!
Thank you…I’m civil engineer and I’m currently working water industry, I do lot of mechanical works, big pumps water treatment plant…this information very helpful to me.. cheers
Amazing video guys. Very informative. I have studied these a long time ago, but it was a complete brush up for me. Thank you and keep up the good work.
It is interesting how you talk about variable speed pumps. At my previous place of employment, many of the larger submersible pumps had a soft start/stop. There were various reasons for this, where they were used in areas, and on pumps, that typically needed this, including safety. Cheers for the video :-)
This channel is doing a great Job. Kudos to the team.Looking forward from this team more like this.Especially more from Thermal devices (AC , REFRIGERATOR,) and components like Heat exchangers etc
I am a retired engineer who during my career had to learn about pumps by "the seat of my pants." This video deals with small potato pumps where as I also specified very large high volume, high or low head pumps. These pump videos are great and cover a lot of important issues but I caution much more must be understood mechanically before specifying a pump. In particular are seal/stuffing box design and bearings. As with fans, low volume, high head centrifugal devices, are tough on bearings. Don't just accept the vendor's bearing recommendation. Personally check with the bearing vendor. You may find yourself needing to learn about bearing and the recommended lubrication requirements before making your final pump choice.
During the design they will define the system requirements, but it's unlikely to find equipment to fit the exact requirements, so it's over sized and then during commissioning they try to get it operating as close as possible to design
Thanks TheEngineeringMindset, I really liked it @8:36 so the manufacturer will make a 6.25" casing for a 4.25" impeller pump!!! I suppose this part needs more explanation. I think the efficiency is lower for smaller pumps because although the surface roughness is the same but the relative roughness (which really matters) is higher in smaller pumps Anyway, I appreciate your review on my video "2 Pumps Basics and Misconceptions (En)" and on the channel as a whole Thanks
In order to understand pump curve is correct, you can slowly close outlet valve then check outlet pressure if it is reach to maximum head or not. For your safety do not keep outlet valve closed for a long time
Amazing Video! Thanks guys you're doing amazing job. The way you explained it is very clear and easy to understand. But I have to disagree with an info you mentioned at 1:00 , as I know pumps don't produce pressure, they produce flow only and the pressure forms from load and friction and the pump has to overcome it to deliver the desired flow.
Pump works on the principle of forced vortex...and if you read about it , you may find there is change in pressure along with radial distance. Moreover while moving out of impeller, the fluid flows through volute casing in which the area continuously increases and the Kinetic energy of fluid concerts into pressure energy. So thanks to shape of casing which changes pressure of fluid as well !!
Such a comprehensive as well precise description. Well done. Kindly do a video that explain pump pressure and performance varying with throttling using animation like this. This would help many to choose right pump for energy savings. Thanks in advance.
NPSH is measure of differential pressure. NPSH is the difference in absolute pressure of the fluid, minus the vapour pressure of the fluid at the operating temperature. The differential pressure is typically stated in terms of the liquid's head (rho G H formula). Also, cavitation is not due to "air" bubbles. It's the fluid in gas phase collapsing that causes the damage. I believe there are examples of using entrained air can reduce cavitation damage. Cheers!
Cavitation is a phenomenon occuring in a fixed volume of space, and the actual phenomenon is comprised of a violent phase change of a mass in the liquid phase, into a mass in the gaseous phase. The 'fixed volume of space', walls of some pump, or the volume of water surrounding some submerged propellers, experiences a great release of energy from the cavitation phenomenon, and damages the pump walls, etc.
@@peterthurman9384 I'm not sure what you mean by a "fixed volume of space", and "violent phase change"? Also, I'm unsure if whether it's the generation of the gas, or the collapsing of the gas that's causing the damage to pump walls, but I suppose it doesn't really matter. The other issue is the vibration that will damage pump seals and bearings.
Regarding 'violent phase change of a mass', this is just my way of describing cavitation, where a liquid changes phase into a gas, then back to a liquid. Recall, the cavitation occurs, because the vapor pressure of the liquid has been decreased, due to the vacuum created by a pump trying to pump a liquid, without there being a sufficient NPSH.
⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕
PayPal: www.paypal.me/TheEngineerinMindset
Thank you!
Thanks bro.
Can't use Pay Pal in India😕😕😕
How changing size of impeller work,when the casing size is fixed? Can someone explain
I will buy Paul a warm lunch and heavy dinner if he will teach me how to prepare presentation like that
Your video was incredibly helpful, thank you! I’d like to propose a slight clarification @2:21 mark. The reason pump manufacturers use meters of water (head) instead of direct pressure is not because pumps can produce different pressures but the same head when different fluids are pumped. In fact, it’s quite the opposite.
Pump performance curves feature ‘head’ instead of ‘pressure’ because the maximum head to which water can be pushed is more practically meaningful for customer needs than pressure figures in bars or megapascals. Pumps do not push different fluids to a constant maximum head. For instance, lighter fluids such as petroleum can be pumped to higher heads than heavier fluids like mercury.
To illustrate, a pump with a maximum head of 60m (of water) can support a 60-meter column of water, but only a 4.4m column of mercury, given that mercury is approximately 13 times heavier than water. However, the maximum pressure in bars will be the same for both cases. I hope this clarification is helpful!
I was just thinking the same! I thought my fundamentals grew weak, thanks for clarifying it again here helps a lot!
You're wrong about that. The head will be the same for all different density fluids in a centrifugal pump. The horsepower will vary as well as the discharge pressure in kpa/psi.
The viscosity however will change the fluid head of a particular centrifugal pump.
As a complete novice to the subject matter this was the absolute perfect video. AND I CAN FOLLOW THE EXPLANATION!!!
Excellent video. I'm student of Mechanical Engineering. This video helped me better understand the basics of pumps
Suppose we have give.
HeAd
How to calculate pressure
This helped me so much to understand stuff at my new job. Out of school it helps with a practical side
1:10 is mind blowing. As a fire sprinkler contractor i learned a new concept about understanding the concepts behind pump curve.
😂
Really great! This short video covers almost all the pump curve concepts I needed for my exams. Thank you so much.
Thanks Paul. I did this course in my Electrical Engineering program and I am just understanding Pump Curve..great job.
I would give you thousands of likes if I could. You literally explained the bloody thing soo much better than the walls of text in my lecture notes
No one can explain better than you.
Please make a video on how to size compressors for HVAC and how do we do retrofit and what are the advantage and disadvantage. I am definitely donating !!!
Thank you…I’m civil engineer and I’m currently working water industry, I do lot of mechanical works, big pumps water treatment plant…this information very helpful to me.. cheers
See our new video on how to build mechanical versions of electronic circuits? Watch here: ua-cam.com/video/Zv9Q7ih48Uc/v-deo.html
I really appreciate all the knowledge you spread around with these. Extremely helpful, thanks!
I teach pump and motor maint. This is the best video I have seen, to simply explain the concept.
Your presentation on pumps is very easy to understand and very helpful to apply to the practical cases.
Thank you very much.
Amazing video guys. Very informative. I have studied these a long time ago, but it was a complete brush up for me. Thank you and keep up the good work.
Glad to hear, thank you
@@EngineeringMindset Sir could u please explain surging stalling and choking using this curve? Its hard and there are no videos about it.
This video, presentation material and style ticks so many boxes for me. Cheers.
You guys need to get in contact with Tafe in Australia because they need this badly. This is the best tutorial by far.
One of the best channels available out there
Please keep posting such learning videos
man i can't thank you enough. i was searching for these and you came through again.
i am on my final year of hydro engineering this is the thing we're studying right now. Couldn't have better timing)
Glad to hear, hope the exams go well!
I am just started how sad it is.But I'm hyped for HVAC!!
Man, what a video! Very good! Your explaination is short and perfect!
the best tutor i found so far :)
It is interesting how you talk about variable speed pumps. At my previous place of employment, many of the larger submersible pumps had a soft start/stop. There were various reasons for this, where they were used in areas, and on pumps, that typically needed this, including safety. Cheers for the video :-)
VFD Video is now live! here: ua-cam.com/video/yEPe7RDtkgo/v-deo.html
Excellent Work. Everything was illustrated intuitively with proper focus on the practical aspects.
It was the best way to explain the graph...thank you so much!
Please do more such video. :')
This channel is doing a great Job. Kudos to the team.Looking forward from this team more like this.Especially more from Thermal devices (AC , REFRIGERATOR,) and components like Heat exchangers etc
Thank you, Sarathy. Have you watched our Supermarket Hvac video? I think you'll really enjoy that
Thank you sir, although I know all of what you explained, I still watched the whole video, liked it and suscribed to your channel. Keep it up :)😍
Great video. Please note industrial voltages in Canada are 600vac 3 phase. Keep the content coming!!
Really your video and way of explanation very fantastic. Because you start from basic. Thank you soo much.
Great Video ! Simple quick explanation to refresh your memory.
Amazing vid! Waited too long to watch, learned a lot!
Pumped up after watching this video...very well explained...👍
Easy to understand. Very helpful for my job.
Thank you very much😊👍👍
Thanks this made understanding pump curves seem much easier.
This video is amazingly easy to follow and incredibly helpful!
Thank you so much! :)
I am a retired engineer who during my career had to learn about pumps by "the seat of my pants." This video deals with small potato pumps where as I also specified very large high volume, high or low head pumps. These pump videos are great and cover a lot of important issues but I caution much more must be understood mechanically before specifying a pump. In particular are seal/stuffing box design and bearings. As with fans, low volume, high head centrifugal devices, are tough on bearings. Don't just accept the vendor's bearing recommendation. Personally check with the bearing vendor. You may find yourself needing to learn about bearing and the recommended lubrication requirements before making your final pump choice.
Very well put!
Hey man you seem an expert on pumps..
Can you provide more informations? Especially on specs we are missing here
Sir, hats of to your experience, need some guidance and information about pumping system for industry,
Great insights, sincerely invite you to learn about our Huayun hose pumps
Any recommend books we can purchase online?
So simple to understand! Wow! Thanks from a layman.
Great pump introduction
FABTASTIC TECHNICAL PRESENTATION OF THE PUMP RELATED CURVES : 🙏
I size and sell centrifugal pumps and this is spot on. you certainly know your stuff. great video.
謝謝！
Thank you! 家駒李
Excellent video, well explained, clear and lucid audio and video. Thanks a lot !!
Great video, I learned more about pumps that I ever cared to know
Massive work with excellent knowledge
This is an exceptional video
Excellent video. This is very informative. Thanks for your good work.
It's very informative with very clear explanation... thank you so much this amazing video 🤩🤩
Great video again. Thanks ! Note that in Canada, 600v is common. 480v is in use in the US.
Seen our new 3 phase transformer video?➡️: ua-cam.com/video/u0SsejDCVkU/v-deo.html
Well done. Clear concise and well illustrated.
This video explained pumps better than my college class, in less than 1/5th of the time. Thanks.
wow, very interesting and comprehensive. thanks!
Thanks for the video sir. Excellent work. Please keep posting such learning videos
Thanks ajay
Do they calculator on every devices , before installing right sir
During the design they will define the system requirements, but it's unlikely to find equipment to fit the exact requirements, so it's over sized and then during commissioning they try to get it operating as close as possible to design
Thanks TheEngineeringMindset, I really liked it
@8:36 so the manufacturer will make a 6.25" casing for a 4.25" impeller pump!!! I suppose this part needs more explanation.
I think the efficiency is lower for smaller pumps because although the surface roughness is the same but the relative roughness (which really matters) is higher in smaller pumps
Anyway, I appreciate your review on my video "2 Pumps Basics and Misconceptions (En)" and on the channel as a whole
Thanks
In order to understand pump curve is correct, you can slowly close outlet valve then check outlet pressure if it is reach to maximum head or not. For your safety do not keep outlet valve closed for a long time
I highly appreciate you for explaining this. thanks.
Super easy to understand ! great job !!
A video on Basement Ventilation would be much appreciated
Nicely Explained.. in a simple and step by step.. Your Animation supporter seems to be a great guy!! Regards from Pune, India
Thank you, do you know we also have a Hindi channel? ua-cam.com/channels/g4k338hz9U8jnD5SXPO5jQ.html
Amazing info 👌
Incredible video !!!! The best channel in UA-cam !!!❤❤❤🔥🔥🔥
best video on pumps!
Absolutely fantastic explanations... loved them.. thank you very much.
Good graphic technical presentation
thank you for liking the comment
Very informative. U guys are doing amazing work. Useful information. Keep sharing!!!
Great stuff guys.
Very clear explanation
Great stuff. Looking at pump curves makes my brain frazle
Very well explained 🤟.... looking forward to explanation of Refer and AC Mollier Diagram
Very helpful. Thanks a lot.
Amazing Video! Thanks guys you're doing amazing job. The way you explained it is very clear and easy to understand.
But I have to disagree with an info you mentioned at 1:00 , as I know pumps don't produce pressure, they produce flow only and the pressure forms from load and friction and the pump has to overcome it to deliver the desired flow.
Pump works on the principle of forced vortex...and if you read about it , you may find there is change in pressure along with radial distance. Moreover while moving out of impeller, the fluid flows through volute casing in which the area continuously increases and the Kinetic energy of fluid concerts into pressure energy. So thanks to shape of casing which changes pressure of fluid as well !!
thankyou for amaing explanation! really love this account
Amazing info,, concise and makes things easy to understand
Very well explained.
Plz keep uploading more videos on HVAC system design
Thanks a lot
Plenty more lined up
clear explanations... very useful
very simple yet very informative. keep up the good work
Brilliant video
Very informative. Crisp and clear. U guys are doing amazing work.
Can you do hvac troubleshooting series videos for split and package units?
Useful information
Such a comprehensive as well precise description. Well done.
Kindly do a video that explain pump pressure and performance varying with throttling using animation like this. This would help many to choose right pump for energy savings. Thanks in advance.
Fantastic video! Thank you so much ! Very helpful, even for those of us already in the industry.
very great presentation, thankyou. that realy helpfull for me.
Amazing explanation, thanks so much!
Perfection in your video Paul, heading to paypal now.
Very informative, thanks so much
Great video. 👍👍
Really really helpful video
Superb man. Enjoyed a lot. Keep doing more. Thanks a lot!!
Cool info !!
... drilling a well in northern CA this month and that's why I'm here
@@MasterCivilEngineering
9 gallons per minute at 200ft
I'm happy with that!
@@MasterCivilEngineering that's what I just hit I'm Nevada county CA
Very well explained, very good.
Informative video and very helpful
GOOD JOB TEAM
Great video.
Please keep the videos coming sir
Jesus the saviour is here.... the best video of the curve ever
Amazing video
A very 🙏good information by you
NPSH is measure of differential pressure. NPSH is the difference in absolute pressure of the fluid, minus the vapour pressure of the fluid at the operating temperature. The differential pressure is typically stated in terms of the liquid's head (rho G H formula).
Also, cavitation is not due to "air" bubbles. It's the fluid in gas phase collapsing that causes the damage. I believe there are examples of using entrained air can reduce cavitation damage. Cheers!
Cavitation is a phenomenon occuring in a fixed volume of space, and the actual phenomenon is comprised of a violent phase change of a mass in the liquid phase, into a mass in the gaseous phase. The 'fixed volume of space', walls of some pump, or the volume of water surrounding some submerged propellers, experiences a great release of energy from the cavitation phenomenon, and damages the pump walls, etc.
@@peterthurman9384 I'm not sure what you mean by a "fixed volume of space", and "violent phase change"? Also, I'm unsure if whether it's the generation of the gas, or the collapsing of the gas that's causing the damage to pump walls, but I suppose it doesn't really matter. The other issue is the vibration that will damage pump seals and bearings.
@@DaveModyWhen I say 'fixed volume of space', I mean, Control Volume.
Regarding 'violent phase change of a mass', this is just my way of describing cavitation, where a liquid changes phase into a gas, then back to a liquid. Recall, the cavitation occurs, because the vapor pressure of the liquid has been decreased, due to the vacuum created by a pump trying to pump a liquid, without there being a sufficient NPSH.
thanks for sharing the knowledge, IF possible can you share video on mechanical seals especially for LPG services
great video , thanks!