Solenoid-Controlled Pilot-Operated Directional Control Valve

This is a large valve with an even larger name. But the way the valve works is actually pretty simple. In this video, we'll go over it piece by piece. And, we'll look at the relationship between the schematic symbol and a graphical cutaway that shows the inner workings.

[brianmackie]

This really helped me understand the fundamentals of pilot control. Perfectly clarified all the points I’ve been trying to figure out! I enjoyed the narrators tone as well, confident and clear, felt like he actually cares about the content.

[machiavelli]

Thanks a bunch man, I have an exam in 5 days and this helped me a lot to understand how pilot operated valve works :D

[Kever]

Thanks! Good animation, clear voice, slow talking (sometimes) makes this very useful for understanding the basics!

[michaelcostello]

Great video. Thanks for explaining the X and Y ports and how you can have an external supply for the pilot valve

[hydraulics]

What I find odd, is the use of system pressure for pilot supply. In mobile hydraulics I am used to seeing a pressure reducing valve in the supply for consistent pilot supply pressure.

[kelvingomez]

those videos are very good tools in understand how the hydraulic system really works.

nice job guys.

[Lbus]

Guys, you are awesome! the best explaining videos I have ever seen!

[kmwongeworldusa]

sir, can you enlighten me that i saw some maker 's catalogue that we need about 4.5-8bar of back pressure at tank line in order to let this 2stage vlv work well .what do you think?

[VivekAnandJ]

Thank you so much for this video. So the X port is only used if you want to have external control of the pilot. So this is optional. Is the Y optional too? Or does it have to be connected to the tank? I'm using a 4 port 2 position pilot controlled DCV. Thank you sooo much in advance. I'm a beginner experimenting on a Project.

[soorajrsekhar]

I have a doubt please clear it when we look in to the pilot section we can see 3 types of operation one is solenoid, spring and other one is what please explain .

[kishorsahni]

Simply a wonderful video. Very good explanation, cool animation. Slightly faster. Kindly give more time in between the explanations to digest the flow. Thanks again.

[BROSKOIU]

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.

[lezaalayon]

Your vedio is big help to me being a technician practioner

[lovrorb]

Would be cool to see a similar video, with "proportional" in front ;)
That's what we use almost exclusevily. It's a relly cool concept of pre-reducing pressure to cca max 40-50 Bar, and then basicaly by controling the electrical force in the solenoid the output pressure of another precise pressure reducing valve is controlled (there are 2 of course, one per direction, but only one at the time is active). That pilot pressure is acting against the main spool providing a degree of spool opening, dependant on the pressure, which ultimately controls flow through it. Every serious manufacturer will provide you with current (or voltage/current in case of built-in amplifier) to pilot pressure to (percentage of maximum) flow.

[thisis]

Does port "X" act as an emergency vent to tank if pressure build up in the pilot section?

[Mech.Masters]

Can you make videos on Proportional Valves and Servo valves..
That would be very helpful to many of them

[Aptx-smbz]

Your videos are very informative. Please keep up 👍

[valentintin]

Hi! Your presentations are great! Just to help, on the graphic cutaway, A and B should be switched, thanks for your videos!

[Toddpain]

Mate, what is with the ominous back ground music? Is this the pilot valve of

[cliffordruguna]

Thank you very much very detailed explanation.