How to Read a Spool Valve Schematic Drawing
ฝัง
- เผยแพร่เมื่อ 12 มิ.ย. 2024
- ▶ C'mon over to realpars.com where you can learn PLC programming faster and easier than you ever thought possible!
=============================
▶ Check out the full blog post over at
realpars.com/spool-valve-sche...
=============================
⌚Timestamps:
00:00 - Intro
01:03 - Pneumatic Valve Symbol
02:15 - Two-Position Spool Valve Symbol
03:20 - Three-Position Spool Valve Schematic
=============================
In this video, we will learn about how a spool valve is represented in engineering and manufacturers' drawings, how to understand what the drawing means and how it relates to the operation of a valve.
As we already know directional air valves, in particular, spool valves, are the building blocks of pneumatic control.
In engineering drawings, pneumatic circuit symbols provide detailed information about the valve they represent.
Symbols show the methods of actuation, the number of positions, the flow paths and the number of ports a valve has.
When we see a valve schematic, we can see it is made up of boxes, each containing a number of lines and arrows.
The number of boxes that make up a valve symbol indicates the number of possible positions the valve has.
Flow direction is indicated by the arrows in each box. These arrows represent the flow path the valve provides when it is in each position.
To the left and right of the boxes, we can see the types of actuators being used;
In some cases, there will be a single actuator at one end of the boxes and a spring return at the other end. In other cases, there may be an actuator at both ends.
The 3-position valve has both solenoids and spring return actuators on both sides of the valve, the spring return actuators will return the valve to the middle position but only IF neither of the solenoids is active.
In this example, the middlebox indicates that there will be no airflow at all until one of the two actuators is active.
It should be noted that colors are used in this video only to assist with learning.
In practice, the schematics you see on a day to day basis will not have any colors.
A typical use for the type of valve would be to bump or inch a cylinder incrementally along its stroke length by pulsing one of the actuators.
The number of ports a valve has is shown by the number of endpoints in a given box.
We should only count the ports in a single box once per symbol.
For example, in the 3-position valve, there are three boxes that show the three possible positions, but the valve has five physical ports.
So the valve will be called a 5/3 solenoid valve.
You may also see some manufacturers use letters instead of numbers to identify the ports, but once you understand the schematic it is easy to translate this.
=============================
Missed our most recent videos? Watch them here:
realpars.com/dcs-vs-scada/
realpars.com/simatic-tdc/
realpars.com/starter-commissi...
=============================
To stay up to date with our last videos and more lessons, make sure to subscribe to this TH-cam channel:
goo.gl/Y6DRiN
=============================
TWEET THIS VIDEO ctt.ac/dodpN
=============================
Like us on Facebook: / therealpars
Follow us on Twitter: / realpars
Follow us on LinkedIn / realpars
Follow us on Instagram / realparsdotcom
#RealPars #Automation #SpoolValveSchematic
The animations make it more clear to understand how to operate manually. Thank you!
Glad it helped!
I don’t know how to describe the effort, the quality and the brains who work on these materials!! HUUUUGGEE THAAAANKS
Hi Fahad,
Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us.
Happy learning!
These videos are fantastic! Very easy to understand! Thank you!
Amazing to hear that, Mauro! Thanks for sharing.
Thank you very much Realpars... This channel is very useful for us..
You are very welcome, Thilina. Great to hear that our course videos are so helpful to you!
Thank u Real Pars your channel is provide too much knowledge
You are very welcome, Asad! Happy learning!
Perfect video for what I was trying to find
That's great to hear. Happy learning!
Very nice information. Thanks so much for sharing with us.
You are very welcome! Happy to hear that you are enjoying our content.
Thanks for the video.
the spool drawing is kinda intimidating at the beginning but once you get a hold of it and understands how it works, very simple to be honest.
Thank you so much, great video.
You are very welcome!
Hi, thank you so much for these great videos
You're more than welcome, Ahmad! Happy to hear that you enjoy them.
Awesome vid, as always 👍🏻
Thanks a lot, Will!
GREAT VIDEO SIR ,, THIS IS VERY HELPFUL ..
Great to hear that! Thanks for sharing.
You've than a great video helps me understand the flow , thank 😊 you
Happy to help!
Thank you very much. This lesson is very good.(in İstanbul)
You are very welcome, Oktay! Great to hear that.
Really good.... More Useful to understand....
Amazing to hear, Tamil! Thanks a lot.
suuuuper helpful wow..thank you so much!
Glad to hear that! You're more than welcome!
Hi. I'm from Russia and i love yours videos. THX!
Amazing to hear that! Thanks for your support.
Great vid once again. Appreciate the time and effort you put into them. Many thanks, keep them coming. 🐵
Thanks for your support, Charlie! We are so happy to hear that you are enjoying our content.
Let us know if you have any questions! We are more than happy to help!
hhrrh&
very helpful,thank you!
Glad it was helpful!
Very useful video !
Thank you!
Waow.
Way to upgrade on the teaching RealPars.
Thank you, Max!
It is great video. Love from India
Thanks for your support, Sandeep!
Nice, thank you
You are very welcome!
Thanks!!!
Thank you very much
You are very welcome, Apinut! Happy learning!
Good job, it was very helpful :)! Keep going!
Thanks a lot for sharing your positive feedback with us, Bartosz!
Good job my man
Thank you, Saifullah!
Love you.
I pass this channel on to everyone of my go workers
That is amazing! We really appreciate that, thanks for sharing the love!
Really thanks
Our pleasure!
Well done 👍👍
Thank you!
Can you make video about proportional valve? You are doing great job with this video!
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Hi, thank you so much for these great videos,
I would like to ask, what is the copyright of this video. if I am gonna play some of them with coworkers?
Hi Amj!
Thanks for your kind comment! Great to hear that you are enjoying our content!
To answer your question, feel free to share this video with your coworkers! As long as our content remains unmodified and always linked back to RealPars.
Happy learning!
Thanks alot
You are very welcome, Javid!
The video is very helpful . Thank you very much ,
Can you make a video about servo valve ?
Hi Mustafa!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Could you do a video Remote I/O (using ABB, AB, and Siemen's)
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
I love this video! let me grow a lot! can I ask what software is drawn in the film?
Thanks for your support! Great to hear that you enjoy our content. I am not sure about this as this is done by our graphic and animation department.
This is really good video! One question, does flow direction matter(arrows)? because i don't see how it could unless the design of the seals or something like that pushes the valve sideways working against the solenoid, does this happen?
Yes, the flow direction arrows are very important. As the spool in the valve moves back and forth, specific flow paths are opened allowing flow in the directions shown. And yes there are seals that prevent backflow or flow to ports other than those in the current opened position. When the valve is de-energized, it is in a fixed position. Fluid can freely flow between the input and output according to the flow arrow. When the valve is energized, the spool is fixed in the other position. While there is some fluid pressure on the spool, there is not enough to affect the valve position in either state.
@@realpars "there are seals that prevent backflow" how would they prevent backflow? they had to have some sort of one way valve and while some may have this most do not right?
"While there is some fluid pressure on the spool, there is not enough to affect the valve position in either state."
If the pressure is not strong enough either way then why would it be a problem for fluid to go in the opposite direction? providing of course it has no form of one way valve.
We are watching RealPars
Great, Wilberth! Happy learning!
Hello, can the direction of flow be switched? For example, in 3/2 DCV, the left arrow is only pointing up, can the flow go the opposite direction as well?
Technically, yes, but you really do not want to do so. Some solenoids (not many, but they do exist) have check valves in the outlet port. Secondly, if you reverse the flow direction, there will be fluid pressure on the "downsteream" port, which can counter the spring direction and pressure, and cause the valve to partially open (weep) or chatter without activation.
Good 👍
Thank you!
Cool
👌👌👌
Kindly upload a video on servo valve also with analog response.
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Are you providing Building Automation cources?
Hi Mohamed,
Thanks for your comment! Unfortunately, we do not have any courses on building automation at the moment.
Needs a video for hydraulics calculations
Thanks for your topic suggestion, Zaithwa! I will happily share this with our course developers.
Thanks again and happy learning!
Please make a video on servo valve
Hey Mitesh!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
Could you please make the videos on hydraulic and pneumatic circuit diagram
Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!
plz sir make a video on PLC programming softwares from where v can get these softwares?
Hi Sheraz,
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Regarding the softwares, we sell a variety of software through our online store. Our current best-sellers are the following two:
Siemens SIMATIC STEP 7 Basic V15 €336,00 EUR
STARTKIT S7 €429,00 EUR
If you are interested in these or looking for a specific software, please email us at hello@realpars.com with the part number of your interested item. We will happily help you out further over there.
Thanks for sharing and happy learning!
Can you please explain Servo hydraulic valve operation please?
Hey!
Thanks for your comment and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
What software did you use to make this animation?
Hi Mohsen,
Thanks for your comment. Regarding your question, I am actually not sure about that as this is done by our graphic and animation department.
👍🏻
Please make videos how to read hydraulic schematic. Thank you :)
Hi Ced,
Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!
@@realpars thank you so much. new subscriber here :D
what is second stage spool valve
Can you guys do a video on convertible 5/3 to 3/2 solenoid valve
Thanks for the topic suggestion, Siddharth. I will definitely go ahead and forward this to our creator team. Happy learning!
can you show what symbols are like VG1,PV2, PP1 andd so on
Thanks for your feedback! I will happily pass it on to our course developers
please do it in Spanish!!!!
Hola Jorge!
Thanks for your comment! We currently only provide our course videos in English, you are always able to turn on the English subtitles as that might make it a bit easier for you.
Our apologies for any inconvenience!
Happy learning!