Vertical Cylinder Motion with a Counterbalance Valve

Learn how a counterbalance valve works! Last week, we had some trouble with a pilot operated check valve: • Vertical Cylinder Moti... . This week, we'll see a counterbalance valve do a much better job.
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LunchBox Sessions is made by the fine folks at CD Industrial Group Inc. www.cdiginc.com

[@josecordova5676]

This is a very important hydraulic material to learning. congratulations to all your crew. and for us too that you compart..

[@Braxask]

Yet another piece of hydraulic didactic with a fixed pump going over relief in neutral. And as in any other hydraulic didactic the explanation of one of the most common valves in the world, the Open Center valve, is abscent. Gear pump, open center valve and relief valve should be first! Still, this is one of the best animation series I have seen for hydraulics.

[@struchol]

Can you do similar video but with double counterbalance vale and show the Overload situation?

[@wristygaming5352]

but why do we have such intense music

[@gemiciengin]

Because, they forgot to mention about the pressure intensification on the rod side of the cylinder. That might be catastrophic.

[@DanTurner4ELR]

@@gemiciengin , no, the Counterbalance valve is also a "relief" valve. It is internally piloted, as well as externally piloted. It prevents over-pressurization from hydraulic , mechanical or thermal intensification. A PO Check would not have the relief function... that could be catastrophic. The external pilot is at a ratio, which is likely for another session.

[@Abhishek23296]

Complicated made easy.. Excellent explanation.. Thank you

[@mbunds]

You don’t “pull” your main load with a cylinder...

[@i.i]

you're the BEST

[@lunchboxsessions]

Glad to hear it! We're trying our best to make excellent training. Let me know if there's anything you'd like to see us do. Take care!

[@tanyouliang]

thanks for the video, it helps my final exam!

[@danfernandes8887]

Great explanation! Thanks for making this content.

[@jbvmpsmtr5488]

On my schematic, there's a number next to the valve symbol (230 BAR). Is that an actual pressure value needed for opening the valve? Great video, btw 👍 Tnx!

[@teis79]

It's the maximum load it holds without pressure at external pilot line. If you have a 4,5:1 pilot ratio it will start lowering the load at a pilot pressure of approximately 51 bars

[@ابوحارثالهيتي]

i need this simulating program,,, or link for it?

[@mohammadk79]

The music makes me feel like I'm learning some black magic spell. Great video btw.

[@lunchboxsessions]

Hell yeah!

[@ToolsAandLogic]

You are doing great work without expecting any money. Teaching someone free of charge is a great service. KEEP IT UP

[@nam4803]

thanks for your sharing

[@nguyenngociep9815]

Counterbalance valve setting í the pressure of load x 1.3 (30%) ?

[@MatthiasSchulenburg]

Wow, this was very clearly explained !

[@mskindia2841]

Nice video , please tell me for a vertical hydraulic cylinder raising and lowering 2000 kg load three times in a eight hours , can counter balancing valve be replaced with meter out flow control valve ?

[@michaelaynscough4958]

Hi very informative. would a counterbalance valve work on the cap end port as well if the cylinder was pushing up the other way ??

[@michaelcostello6991]

great teacher. Thanks for clarifying its operation. Not sure why i attend night school !!

[@Mech.Masters]

Best video on Hydraulics

[@lunchboxsessions]

Thanks!

[@عباسملکثابت]

why do you don,t use a single direct flow control valve in this positions? what is the difference between this two?

[@mzee5533]

Was just working on this on a Drill in the Valley BC

[@hwodepartment3099]

Wonderful and very Informative video, Many thanks to you. My question is this.: if the external pilot line ruptures while the load is being lowered, what will be the effect on the movement of the load being lowered.

[@harichintha4985]

Counter balance valve close the port so load will not come down

[@Eagle2pro]

What if no load and using a bi directional motor on a crane wire

[@vishwanathmayekar6737]

Simple explained thanks

[@Keith_4strung]

Do you have this video in single acting?

[@ganeshhimane2572]

Reason of hydraulic oil temperature increases other than heat exchanger

[@eappenjacob1894]

If the relief valve is leaking, it would increase the sump oil temperature.

[@Mech.Masters]

In some applications i have seen a counterbalance valve being used without a external pilot line. Why do we need a external pilot line when there is already a internal pilot line in counterbalance valve doing the same function?

[@yaribsuarez8725]

An internally piloted counterbalance valve (in the rod end, as it is in this case) continually exerts back pressure, even at the limits of travel, and continually opposes the pressure induced force of extension, thereby limiting the maximun extension force. This is suitable for load handling applications in which the load must be manipulated yet not damaged. When both externally and internally piloted counterbalance valve is used, the function of the internal pilot on the rod end is to provide back pressure supporting the load while it descends, however upon reaching the limits of travel or being otherwise restricted, the external pilot on the cap end overrides the internal pilot and fully opens the counterbalance valve. Back pressure is absent and the hydraulic system can exert full pressure induced force. The combined effect of both the weight and the full unopposed force of the hydraulic system can be put to use for a press, stamp or molding application. All this information I got from Jim Pytel (BigBadTech Channel) here on youtube. Hope it's clear

[@Mech.Masters]

Its clear now..... Thanks for your crystal clear explanation

[@winnaingtun2744]

Thank you very much for your contribution. This is the best training aid for us. We would like to get & see the working of counterbalance valve of Travel Motor from an Excavator & Winch Motor from Crane. How to act this valve in free fall operation of Crane? Thank you again.

[@axelbishop1024]

sorry to be so offtopic but does anyone know of a trick to get back into an instagram account? I somehow forgot my login password. I would appreciate any tips you can offer me.

[@calvinruben2013]

@Axel Bishop Instablaster =)

[@axelbishop1024]

@Calvin Ruben Thanks for your reply. I found the site on google and im waiting for the hacking stuff atm. Seems to take a while so I will reply here later when my account password hopefully is recovered.

[@axelbishop1024]

@Calvin Ruben it did the trick and I finally got access to my account again. Im so happy:D Thank you so much you really help me out!

[@calvinruben2013]

@Axel Bishop glad I could help xD

[@jaskiratsingh6409]

what application/software are you using

[@lunchboxsessions]

Our in-house team of animators and programmers build these working simulations from scratch. They draw all the graphics individually, and write all the logic code that powers the system behaviour and interactivity. That lets us be very custom with how things look and work, so we can make sure we're getting exactly the result we need for each project.

[@robCaB]

Excellent videos, just a quick question, what is the point of the internal pilot valve? When a load is in the raised position wouldn't the the pressure on the internal pilot line open up the valve back to tank? Thanks.

[@lovrorb]

As a commissioning engineer of more complex machinery I was asking myself the same question. I was lazy enough to ask the designer, my best guess is for protecting the cylinder/motor in case of overpressure generated by some (too) heavy load or some uncontrolled pull of cylinder. It efectively adds up to to the pilot ratio obviosly. So if you have 1:4.5 pilot ratio and spring setting of 330 Bar, you'll need at least 60 Bar in above line to open it. This is of course in case you don't have any load and ideal cylinder. In real life cylinder you'll have to account for some losses, generated by piston friction dependant on flow and inertia, in smaller portion. Pressure setting of the spring should be higher than maximum designed load generated pressure of course

[@robCaB]

Lovro Šipovac thanks for that, much appreciated.

[@lovrorb]

No probs. Your inquiry made me a bit curious so I googled and found a great article that expains your question and much much more! www.hydraulicspneumatics.com/other-technologies/book-2-chapter-5-counterbalance-valve-circuits

[@MarceloMouraMG]

If I understood the question correctly, even if it had enough pressure to open the pilot line, both sides would be with the same pressure, so there would have no flow.

[@yaribsuarez8725]

An internally piloted counterbalance valve (in the rod end, as it is in this case) continually exerts back pressure, even at the limits of travel, and continually opposes the pressure induced force of extension, thereby limiting the maximun extension force. The function of the internal pilot on the rod end is to provide back pressure supporting the load while it descends

[@CristianoFénix-z4b]

Excellent

[@jorgevb81]

Thanks!

[@mskindia2841]

Nice and informative video , thanks , what will be the circuit for car lift ?

[@zubinhathiari4202]

Mandar Kulkarni contact on [e-mail] Maybe I can help if it is pending

[@KIMIRAIKKONE198N4]

yes.... in every car jack there is a CBV

[@fablefable8772]

Good job, if passible could you please tell me a name of program for simulation

[@vduijn]

follow

[@michaelzajac5284]

High Pressure means Overload?

[@lunchboxsessions]

+Michael Zajac - The pressure colors are relative. In this system, High Pressure is equal to, or slightly below, the setting of the relief valve.

[@michaelzajac5284]

Thank you for message, Teacher. I'm collage, I was learned my lesson that Fluid Power.

[@TheChinmoy]

I Want an animated video of boom luffing in a reclaimer. Searched everywhere but couldn't find anything.

[@abhishekagarwal9699]

Very helpful! Keep up the good work.

[@antoniofigueroa803]

Very good video

[@GraydonTranquilla]

Very clever and interesting....

[@lunchboxsessions]

Thanks! Any suggestions for future videos?

[@andrejdobrijan9225]

LunchBox Sessions Toque,power control on axial piston pumps.Shoulld be interesting

[@kevinmascarenhas9175]

Helloooo

[@Silentobserber]

Great

[@martinrisaavedra8764]

Now you have a new subscpritor Thanks for your effort

[@ragababdo9729]

could u tell me the name of prog u used in this videos?

[@lunchboxsessions]

I'm glad you asked. We make the software ourselves, and you can read more about it on our website: www.cdiginc.com/live-schematics

[@o0phuoctai0o]

does the company sale that CD live schematic for study purpose ?

[@lunchboxsessions]

No, but if you register for LunchBox Sessions, you'll be able to use our media for study purposes as soon as the site is open for the public (very soon).

[@o0phuoctai0o]

nice, i hope we can have more schematics soon as well. Thats help technicans alot

[@e.umapathyengguma6809]

Sir This type of counter balance valve available for pneumatic?

[@manikantarachuri1097]

Sir, In hydraulic drawing in cylinder mentioned KB,KST ? What is the meaning of these words. Please explain once.

[@prasunroy4559]

This is a good idea and nice video I have ever seen .I watch fully and notify all these matters and enjoying.Everyone should watch fully this video and knowing this subject .Thanks for sharing this type of good video.

[@adilshaikh8861]

Please upload video on the topic of prefill and exhaust valve

[@rupanjansaha4788]

in 1:19 , u are telling internal pilot line as per diagram . but diagram showing it is a external pilot line .???? plz clarify my doubt .

[@yo64yo]

I am currently having trouble clarifying your doubt sir, it seems as though my computer is currently facing adversities in the running portion, if you would like to clarify this doubt, perhaps hit on run, oops i mean hit on replay and watch just a few more times sir, eventually all will become clear and you will be able to ride the hydraulic waves to the heavens, taking in all the beautiful sights of the oil ocean, seeing oil whales and oil dolphins and oil fish, it's a really beautiful sight to see. XD

[@arifgusanto1255]

What is name aplikasi?

[@mohamedeldeep2657]

very very good