Pressure Differential and Cylinder Movement

Website: klettetech.com/
Instagram: / klettetech
Publisher: www.atplearning.com/product/10...
This video is about Pressure Differential and Cylinder Movement.
For more information on this and other fluid power topics please check out my book published by American Technical Publishers.
www.atplearning.com/product/10...
Instrgram: / klettetech
@KletteTech

[@AlexMadinger]

Very good example to show the mechanics of what's happening. I wish I had seen this earlier in my learning.

[@KletteTech]

Glad you found it helpful

[@thomassim5600]

Thanks Kettletech, i just want to let you know your selfless sharing has really helped people like me.. cleared many doubts.

[@KletteTech]

Happy to hear that! And thanks for message. I am hoping to recording some more videos soon.

[@Abhishek23296]

A subtle and simple explanation .. Thank you sir

[@KletteTech]

Your Welcome. Thanks for watching

[@dijon4422]

Great video. I like the visual demonstration

[@endtimeawakening5557]

Awesome demonstration, you have a true gift for teaching! You seem to have found what you were meant to do in this life...

[@KletteTech]

Wow, thank you!

[@endtimeawakening5557]

@@KletteTech 👍

[@rockymambwe5559]

Thank you very much you have a gift of teaching.

[@Penthousesup]

Simply perfect explanation

[@mannyfernandez7028]

it helped me a lot sir.I have a clicker press and your video helped me a lot in understanding how it works.thank you.

[@KletteTech]

Great. Glad it helped.

[@mannyfernandez7028]

KletteTech another question sir..my clicker machine has a messed up wiring..It has a variable timer relay instead of a potentiometer to control its cutting power..my question is what does a potentiometer do and what does it control , the solenoid or the pump((flow)?..thank you in advance sir.

[@kennellcrash]

congratulations, great explanation!!

[@KletteTech]

Glad you liked it!

[@srinivasj9009]

Very Nice and Simple way you have explained it..

[@KletteTech]

Thank you so much 🙂

[@prasadadavi6618]

Too good explanation sir 🙏

[@Omar-lf9iq]

Thank you for explaining

[@MuhammadQasim-th3ed]

Sir you are Great 🙋🙌❤️👍

[@crisjaq2874]

Thanks a lot, it helped me a lot

[@KletteTech]

Awesome. Thanks for watching.

[@jujurituhebat7575]

Amazing easy to understand thks

[@KletteTech]

Glad it helped

[@akachijohn9350]

Thanks so much i really enjoy it, But i have a problem here if i fully extended my luffing boom it will come down automatically pls what could be the cause of it

[@ramakrishnasveera8782]

superb ...

[@stjepanveselcic2215]

Thank you for such an excellent explanation. Do you have some book to recommend regarding pressure, flow and hydronics? Thank you!

[@KletteTech]

Yes I do. Here is the one I wrote: www.atplearning.com/product/1028/fluid-power-systems

[@mazharhussain2213]

Simply love you sir

[@KletteTech]

Thanks. Glad you like the videos

[@gntsowe2405]

well explained...

[@cannonparajuli4694]

well explained.

[@pecobafriends7345]

Very well explained But it's the force due to pressure acting on an area that decides the direction of movement If you have equal प्रेशर on both sides , cylinder wI'l extend

[@johanfourie2446]

Very good.

[@KletteTech]

Thanks!

[@krishnamunda884]

Thanks

[@senakaliyanage3856]

Yes I got understood

[@KletteTech]

Thats great.

[@BROSKOIU1]

I have a problem with retracting rod of the boom cylinder at a new miniexcavator. It's pilot operated spool. I checked everything but the spool itself and the components. When retracting rod into cylinder it is an obstruction as it doesn't let bottom oil from cylinder to go freely back in the return line/tank. After 100 hours , this problem laminated my hidraulic oil and really broke his molecaular structure and turn it brownish dark (Iso VG46) and heats above 80 degrees celsius. Is it posible that somehow the joystick pilot pressure isn't enough to push the spool proper into corect position and the return line is chocked? Maybe the spool spring too stiff? Any help apreciatted. Thanks.

[@bilalsam3299]

Thank you sir

[@KletteTech]

Welcome

[@laedo971]

Hi I think that when the shaft is going out of the cylinder to move a 400 PSI load, and the pressure in the right side compartment is 150 PSI, then the pressure in the left side one should 400+150= 550 PSI or a bit more. Do you agree?

[@KletteTech]

That depends. In the video I say it takes 400 psi with the load and knowing everything else. that would include the 150 psi on internal resistance of the flow going back. I might not have been clear enough on the point. thank for pointing that out.

[@jclinellc]

Unless you couple the inlet of the pump to the output of the piston it takes more PSI than stated to lift the load and return the fluid.

[@ibmk6308]

Dear, your instructions amazing ,, do you accept that atmospheric pressure is 14.7 PSI NOT zero,,,,thanks

[@powderflint]

I need to know how to build a system for two cylinders to move the ( same ) under different loads in and out ?

[@KletteTech]

Check out a flow divider. Lunchbox sessions has a good video on it.

[@saeedalsaeed4054]

I have injection molding machine and I have problem with movable plate it’s retracting alone slowly without pressing anything on the control panel ! Anyhelp please

[@KletteTech]

Which way is it retracting? If it is retracting down, the DCV might be allowing the liquid to pass through it. A pilot operated check valve might fix the problem.

[@dannyryan9494]

I have a trailer when the oil is cold it will only lift 3/4 of the way up and stop if you wait until the oil is hot then it will lift all the way up most of the time can you help me with information how to fix it thank you.

[@KletteTech]

I have seen this before. The problem could be when the oil is cold that the viscosity of the oil changes. The slower oil causes extra resistance which increase the needed pressure. One solution would be to increase the pressure setting on your pressure relief ONLY if increasing does not exceed the maximum pressure on any of the hoses, connectors, or parts. If the power unit does not have an adjustable pressure relief, you will need to contact the sales rep to see if you can adjust it by switching out the internal spring. Another method would be to add a heater to the tank if that is possible. Totally depends your trailer's setup. Any other questions let me know.

[@sanjeevbhogal6818]

what psi if we want to stop under load and stop it right there like forklift.

[@KletteTech]

Great questions. The answer depends on a couple of factors. First what type of center does the directional control valve have. In my video there is no center it is just a 4/2 DCV. That is a bigger question than I can answer here. The second factor is how much load in on the cylinder. If that is known, then take Force/Area of the piston and add roughly 20%. For more information on the different centers I would recommend checking out Fluid Power Systems published by American Technical Publishers.

[@ahjaygarza2440]

Stupid question, but why exactly does the pressure drop in the rod end of the cylinder barrel when the directional control valve shifts? Because that part of the system is now exposed to the atmosphere via the tank? I'm not too bright, but I'm trying to learn. Tired of breaking my back doing manual labor in a fiber plant for $13 per hour.

[@KletteTech]

Yes that is correct. When the valve shifts the rod end is exposed to atmosphere and pressure drops.

[@ZULFERISYAHPUTRA]

Dear Sir..........I have single acting a cylinder with a bore of 18 mm and a rod of 10 mm and a stroke of 300 mm. I want to know what is the pressure if my cylinder presses 10 mm ........... Please advise and provide a solution with the formula

[@mubarishussain3696]

9:12. What if you have equal pressure on piston and the rod side. What will happen. I am guessing it will extend because of larger area of piston and hence larger force. So I think it is the force which decides the direction of the movement not the pressure. Please correct me if I am wrong. Great video appreciate it

[@kevinhale4921]

You are 100% correct

[@mostafaahmed2332]

i thhink during extension .. pressure on right side will be more than 400 psi due to pressure intensification . Is that right ?

[@KletteTech]

I do not think so. If there was a flow control metering out the flow on the extension then yes. But there is not so i think 400 would be correct in this example.

[@Samath180]

Sir... 💖💖💖💖🙏🙏🇱🇰

[@moseszawe182]

what course air lock on a double acting cylinder

[@elizabethjohnson8915]

Pura vida

[@harimharim132]

Practical problem in hoisting : Cylinders r not hoisting up or down with solenoidal valves. Upon Maunally pressing the solenoid valves, cylinders moving up n down. So, there is a problem in valves. To check this, we want to remove solenoidal valve from the circuit. Can we remove valve with the cylinders being in up position ???( pump supply in off position)

[@KletteTech]

I would be very careful. If the cylinder is up it could start to drift. Lock it out if you can. Best bet would be to retract the cylinder. With the cylinder up there could be a lot of pressure in there. Safety first.

[@sajanjoel2088]

Good teaching Thank you so much sir I want to learn more can you help me

[@KletteTech]

Keep watching

[@mohammad45h]

سلام 👋 بزرگوار استاد تشکر وهزاران 👍.. هرکجا که هستین تندرست وسلامت باشی لطفا گهگاهی ویدیویی از اموزشهای خوب هیدرولیک هم زحمت بکش....زمان زیادی است که ویدیوی جدید نگذاشتین ...استدعا دارم حتما اقدام نمایید...ممنون و 👍....

[@KletteTech]

ممنون که تماشا کردید و خوشحالم که ویدیوها را دوست دارید. امیدوارم به شما کمک کنند!

[@gregajevnisek9]

nice more tutorials

[@KletteTech]

Just put a couple up in the last 24 hours. Glad you like them.

[@gregajevnisek9]

@@KletteTech I understand more and more because I need for my job. It's a new field for me. I would just like that you can slowly for 1 's or 3 to show connections that can be more clearly for us, ok. For further questions can I wrote and email in future , if I have a questions?

[@KletteTech]

Of course. Please e-mail any questions [e-mail]

[@gregajevnisek9]

@@KletteTech thank well keep in touch

[@maharajan2412]

Hello sir i need one type hydraulic drawing explained sir

[@KletteTech]

Send it over

[@tuobahc]

Not an engineer but when you say pressure relieve valve releases all your oil is it accurate? I'd guess you mean the overpressuring oil only not all of the oil right that would defeat the purpose of a pressure set pressure release valve?

[@KletteTech]

All the oil coming from the pump. that is over pressure. All the oil in the system would stay at the pressure the pressure relief is set too

[@naughty_vino0465]

How servo valve for lvdt

[@KletteTech]

I would like to do a video on Servo valves. But, I do not have any at my work. If I get one I will create a video on them.

[@fiolds350]

That piston would slam the blind side so hard into the housing

[@KletteTech]

No it would not. Hydraulic oil moves to slow for that to happen

[@KeeceWookie]

Hey Pat!

[@KletteTech]

Hello.

[@KletteTech]

It has been a really long time. How are you doing?

[@mohamedlazar4101]

Svp explication en francais

[@judah2kx]

You didn't mention that between directional valve and relief vale there is a non return valve. This would confuse people

[@KletteTech]

Do you mean a check valve?

[@judah2kx]

@@KletteTech Yes

[@pnachtwey]

Pressure doesn't move pistons. Force does. The pressure on the rod side can be higher than on the cap side and yet the cylinder will still extend became the cap side has a bigger area an a greater for e.

[@tomconner5067]

Force = Pressure (psi) x area²"

[@KletteTech]

Thanks