Hydraulic Cylinder Circuit - Speed Control and Intensification

Very well explained . Ive experienced this very thing . On a 20 tonne Cat excavator we had a thumb installed and used a old Hitachi boom lift ram off a 10 tonne Hitachi . The Hydraulic hose guy we got to plumb it up only used 3/8 hose and a 3/8 cross line relief valve . The bucket hoses on the Cat were 3/4 . When grabbing a lot of trees and rubbish the cylinder shattered in half. We replaced it and it did it again about a week later . We got and expert hydraulic man to take a look and he replaced everything with 1/2 inch and the problem went away . The oil just could not return fast enough through the 3/8 system . The danger of using people that know enough to be dangerous and a costly lesson . The technician that fix it said that it could have cause a spike as much as 20000 psi inside the cylinder . Just completely chopped it in half

This is the coolest thing I've found. Great work on the videos. Cheers.

You are doing a great job! Super clear explanations.

Very informative and quite interesting. From your demonstration, it's easy to see how you could generate too much pressure in a hydraulic cylinder especially when it bottoms-out. A very dangerous situation. Thank you.👍🏽🤠 4/10/23

I was looking to learn about hydraulics for a dyi - thank you! Your clips are amazing. You're a good teacher.

You are a remarkable and effective instructor. Thank you!

This video is incredibly informative! Thank you for making it!

Great presentation, very clear and accurate. 🇬🇧

Great explanation! Very easy to understand this. Since there is less surface area of the side with the restrictor due to the piston rod, that side will build a higher fluid pressure to balance the push against both sides of the piston. However, I think that the less the restriction of flow, there is more relief to reduce the higher pressure differential. I find that there are one-way flow restrictors to eliminate need to a directional bypass. I had to subscribe.

Thanks... It helps me a lot...i'm studied electrical but now works in mechanical and starts hydraulic...

Awesome job!

Great video!! We love hydraulic repair down in Alabama.

Thank you for the good simplified information. I liked you accent.

Excellent illustration

This is really an awesome video.Its going to help in my designs.Thanks for the great work

Very good demonstration. Thank you 🙂

very good information and presentation. well explained thank you and keep them coming

Excellent video and explanation thank you🤘

Great explanation. Very clear. thank you.

Very helpful. Thank you so much!

This is awesome, thank you very much

Bravo.Clean and crystal clear 🤝 It would be a great help if you teach us how to manufacture a Double acting cylinder. With circuit Diagrams,Design & material selection.

Very good, I've learned a lot. Thank You.

thanks sir, a very good idea.. we exploded one cylinder twice by giving more pressure in extraction and now only i came to knew why.. nice job. upload more videos.

Amazing well explained

Very good videos, have you changed your page as I notice you haven't posted any videos in a while? Also is this pressure increase ever used on purpose?

thank you very much for your video

thank you bro for your explain ❤

Nice explanation. Great safety glasses.

Very good video. clear and easily understood.

Very clear and informative.

Great! Thanks allot for that video

GREAT CONTENT !! BLESSINGS!!!

thank you thank you

you are awesome

thank you, very good video

Good training for learning stage peoples thank you very much

Well said!

Awesome!

There actually is one very good reason to use a meter out flow control valve. If you have an overhung load on the cylinder (the load can pull or push the rod), with meter in, the load can produce a vacuum within the cylinder and travel unexpectedly. With meter out, it will be fluid locked and can not be pushed or pulled by the load. Much safer. Just use components capable of handling the pressure.

Thank You very much sir !

Heartfelt thanks for unselfish sharing your knowledge Sir!

One word, actually three - Very Good Teacher

Thanks a lot.

super dear lot "love" from Jammu(india)

Good teacher.... Give us more

I want to build a hydraulic system and I need t work out what size pump to use...I got a 6 horse power Kubota diesel...that is the starting point...I am building a log splitter maby one 30 ton cylinder ....do you have a video to explain

ive watched this a few times, i understand your correct way of limiting the speed to the back of the cylender, but you only showed the 'wrong' way to attach the flow control valve to the top end. IS the correct way just the other way around? (if i want to limit the retraction speed - to make them the same) i'm hoping to make my own little excavator. many thanks for these videos they are so great and helpful cheers from the UK o/

U r great....😎

well done

These videos are great!

Maximum stroke per minute of hydraulic double acting cylinder.??

Wonderful wo

Thx this was insightful….wonderful explanation

An excellent instruction video. I do detect a NZ accent.

love it

In this configuration, what kind of distributor valve are you using ?. Thank you

Is there a way pressure intensification can be put into good use?

Very interesting

Is there a way to reroute your ram end pressure line with a relief valve on return to valve bank that would push that oil straight back into the base end of the cylinder for a faster extending of the ram ?? Kinda like an ER system

អគុណបងthank

Good knowledge

How is the pump relieving pressure when the hand valve is in the neutral position? Is it going through the hand valve back into the tank, the red line?

Thanks for your help! hydraulic-master

Hi Im looking to alter a hydrauic function on my mini digger and wondered if you would possibly help reading a hydraulic schematic for my machine?

Very good teacher

Really goog but what's about rod end and head end instead of back side and front side of cylinder....does it make sense ? Just wondering.

Man your good

Is the control valve you are using a TANDEM CENTER control valve?

Hi, is it possible to use a Hydraulic cylinder as an oscillator at 150Hz?

非常好

Can I see which type of lift you made which is your behind

nice

Sir how to solve automatic level for genie boom lift problem can you teach

what do I need for a 2 ton ram please

How fast can you make one go

What if there is no valve, like machinery have? What if it was a hydraulic system in an animatronic?

Cool! Ok so how do you maximize the speed in both directions (and have them at least the same) to get the fastest cycle times? Also, what effect does speeding up the cycle have on the max force that a cylinder can generate?

so meter out is not the way to go, it will increase the pressure, build up heat which is not good for the system i suppose, correct me if i am wrong, thanks.

Is there a flow control valve to regulate even flow to 4 cylinders at once? I'm trying to make/operate 2 scissor lifts simultaneously to lift the rear of a truck up 20" to dock height. So 1 scissorlift on each rear corner of the truck and 2 cylinders on each scissorlift. They'd be driven off a drive powered by a 12vdc battery. I'm not far into planning this yet so.....

2:30 I was not prepared for this level of violence. A content warning may be necessary.

very helpful videos, but i have challenges controlling the swing speed of an FFLB crane, i notice that there are variable voltage soleniods that also control speeds of hydraulic flow and cylinder movements. pls have you come across such solenoids??

Dear sir, Firstly if we close rod end of this piston then we put pr in a confined hydraulic so how pr is increases? Also as the system pr is same for area difference of the piston head end & rod end force is different but pr should be same. I still not understand how pr increases? Plz explain anyone.

I am working on a project. Can you help me.

I have a small trailer that has a hydrolic hand jack to raise turn lever and it goes down I am changing to a hydraulic cylinder with hoses to run back to valves on my sub compact tractor. What kind of cylinder do I look for to raise and lower bed ? Wagon capacity is 2000 lbs

One question i have an electric dual hydraulic pump but need to use on a single cylinder can i still manage to use the dual hose electric pump with that single cylinder? Is there a y adapter that can make that possible?

My question is more about rotary actuator speed control not so much as linear. Quick question....most people discuss hydraulic motor RPM off the reference to an electric motor driven pump. I understand that hydraulic motor speed is established off volumetric flow. Since most pumps are driven off AC motors they tend to have a set RPM which in turn produces a set GPM output flow. This in turn results in the hydraulic motor having a set RPM if not controlled by some form of restriction valves. However, in the case of a gasoline or diesel power engine driving the hydraulic pump....don't we gain greater control over the RPM of the hydraulic motor, by controlling the engine RPM since that should change the GPM of the attached hydraulic pump?? I guess what I'm asking is if we slow down or speed up the RPM of the pump we would essentially be decreasing or increasing the supplied GPM at the motor and effect the speed.....correct??

at the end, he placed the control valve and check valve in series, but the circuit on the board shows they are in parallel. or I'm wrong somewhere?

Ok, got a question. My backhoe stabilizer legs are WAYYYY too fast retracting and dangerous. How can I slow them down ?

Great video! Especially that you used actual components rather than teaching via a drawing on the white board.

How would you speed up overall operation without changing the pressure of the system?

I think you say preassure unit is bar while it is psi. Could you confirm please?

when you restrict the follow of oil does that cause the oil to rise in Temperature. ??

why not increase surface area on the other side by reshaping the back of the piston in an angle increasing its area

way of your teaching is good, the another person on this channel is bit difficult to understand due to acsent

This is a very informative video, especially with your real-world demonstration. But you should really use standard ISO symbols to represent all components. These standard symbols not only denote specific components, but also illustrate their functionality. This makes it immediately clear what specific type of valve we're using without having to define or explain anything. Also, standard terminology - like rod end and cap end - should be used in describing the cylinder instead of front and back. We all need to be able to communicate by speaking the same language.

Thank you for these lessons, but what is the point to make videos and not answering to the questions ?

if the flow control valve cum check valve piston side flow control valve rod side.how i increase the forwerd and reverse speed of the cylinder if pump not change.

you had that metering valve hook up in series you hook up not like your drawing there not same

Helo sir my hydraulic pump making noise after three or four working hours. What is possible error in the system. Kindly guide me to resolve this problem Thanks.