What is a Pneumatic Actuator? | Types & Applications
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- čas přidán 21. 07. 2024
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⌚Timestamps:
00:00 - Intro
00:49 - Types of actuators by their energy source
01:12 - Types of actuators by their motion
01:31 - 1) Rotary pneumatic actuator
01:58 - 1-1) Vane Actuator
02:11 - 1-2) Rack and pinion
02:23 - 2) Linear pneumatic actuator
02:31 - 2-1) Piston
03:02 - 2-2) Spring/diaphragm
04:09 - Pneumatic actuator in action
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In this video, we’re going to talk about pneumatic actuators. We’ll look closely at the operation and application of the most common pneumatic actuator, the spring/diaphragm linear pneumatic actuator.
An actuator is a device that makes something move or operate. Actuators make life easier for us every day, and they are the workhorses of the industry.
There are three typical types of actuators used in industry as defined by their energy source:
- Electric
- Hydraulic,
- Pneumatic.
A pneumatic actuator converts energy in the form of compressed air into movement. Pneumatic actuators are categorized by their type of motion. They are either Linear or Rotary.
1) A rotary pneumatic actuator can make something move in a circular motion. For example, a rod in a rack and pinion drive system is used to produce rotary motion.
In the Rotary pneumatic actuator category, the Vane style and the Rack and Pinion style are very common.
1-1) Vane Actuators have a cylindrical chamber in which a movable vane is mounted on a shaft. Pneumatic air under pressure applied on one side of the vane causes it to rotate through its stroke.
1-2) Rack and Pinion actuators use a piston attached to rack gear. When pneumatic pressure is applied, the piston and rack move linearly rotating the pinion gear and driveshaft.
2) A linear pneumatic actuator can move something in a straight line. For example, a rod is moved in and out of a cylinder in a linear motion by a pneumatic energy source. In the Linear pneumatic actuator category, the spring/diaphragm style and the piston style are very common.
2-1) The piston-style pneumatic actuator utilizes a piston inside a cylinder. The movement of the piston is caused by applying pneumatic pressure thereby moving the piston upwards.
Removing the pneumatic pressure causes the piston to move downward due to the pressure of the spring. This motion is referred to as Air-to-Retract. An Air-to-Extend motion can be also be achieved by rearranging the spring, piston, and pneumatic supply.
2-2) The spring/diaphragm pneumatic actuator is probably the most common actuator used to operate industrial process control valves. So, let’s have a closer look.
The spring/diaphragm pneumatic actuator consists of a diaphragm and plate that are connected to an actuator stem. A flexible diaphragm is enclosed in pressure-tight housing.
Pneumatic pressure enters this housing applying pressure to the diaphragm. As the air pressure increases to the diaphragm the force exerted against the spring increases causing the actuator stem to move.
Reducing the pneumatic pressure will cause the spring to retract the diaphragm. The actuator stem will move a valve in or out of a valve body.
In an air-to-open operating condition, the spring forces the valve closed.
The air pressure on the diaphragm creates a force that overcomes the force of the spring and opens the valve.
By rearranging the spring pneumatic supply, this type of actuator can fail-open or fail-closed when air pressure is lost.
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#RealPars #Actuator #PneumaticActuator
Well explained... Such a great animation! Thank you RealPars team.
Glad you liked it! Thanks for your support, Maryam!
Thank you again Realpars!! Regards and Happy New Year
Our pleasure!
been waiting for a video like this. simple but packed of explanation and great animation for easier understanding. you sir have earned my subscription :)
Awesome, thank you!
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This vid is a live saver, thank u very much for explaining everything so quick and simply!
Our pleasure! Glad to hear that, Wan
Danke für Informationen... guten tag
Your videos are really amazing!!! Happy New Year
Glad you like them!
Well explained! Thank you!
Glad it was helpful!
Thank you Realpars!
Our pleasure!
Great work
Love all your videos
Thanks a lot!
very helpful. Thanks a lot!
Glad it was helpful!
Great animation.....
Waiting for next videos ....
Please add videos on VFD s, servo system
Thanks for the feedback and topic suggestion!
great thank you RealPars
You're very welcome, Mehdi!
Great explain
Glad it was helpful!
That is so wonderful ❤❤
Thank you!
I think the industry could really use a great video on pneumatic pilot positioners where an EPT is controlled to supply a signal pressure to the pilot positioner which then rescales it or provides a higher volume of air for the actuator. Pneumatics seems to be a lost art that so few understand anymore.
That's a great topic suggestion! I will happily go ahead and pass this on to our course developers.
Many thanks for sharing, and happy learning!
Nice information sir thanks
You're very welcome!
thanks this saved my assigments
Great to hear that!
The videos you create are graphically beautiful and so easy to understand! Thank you for your time and effort!
Schools make it so hard to explain processes that should be easily understood bruh
You're very welcome! We're very happy to hear that our course videos have been so useful!
Many thanks
You're very welcome!
Thank you 🇹🇳
Our pleasure!
Fᴀɴᴛᴀsᴛɪᴄ ❤️
Thank you for Knowlage
Our pleasure!
Hello , thank you for the lesson i want to ask if you can put a lesson about positioners
Thank you for your topic suggestion, I will happily go ahead and forward this to our course developers for you.
Happy learning!
@@realpars thank you i appreciate your consideration ♥️
Nice 👍👌👌
Well that’s a great explanation but i just wanted to ask you a question that how the 15 psi or let’s say even 60 psi of pressure on diaphragm will stop the process flow where the pressure is around let’s say 400-500 psi. As we know both are forces but how the small force is stopping the big force. Has it has to do anything with area because F=PA the larger the area the more the force is. Plz clarify
Hi @Adnan Rahim. In many processes, a valve positioner is required. In a nutshell, a positioner receives the control signal and provides whatever additional air pressure is needed to move the valve to its required position. I hope that helps.
@@realpars I agree it receives 4-20 ma in a transducer which converts this into 3-15 psi and inside the positioner there is an amplifier so to amplify this small pressure into something big pressure. But again my question was clear and I didn’t get a proper answer.
@@1Sumalani Thank you for getting back to us. Sorry to hear that you feel your question has not been answered. We weren't clear on your question and as such, an answer was provided about positioners as they were not discussed in the video. In fact, based on your last response, I do believe you've answered your own question. The internet is loaded with details on pneumatics and Pressure/Force diagrams that should provide some clarity for you. Thanks again for interacting with us.
Sir my question is that can we operate a pneumatic actuator in analog manner...... Like 10%, 20%......and so on....... Or does thhis operate only on 0 or 100%
Hi there. Yes, many pneumatic valves can be throttled from 0 to 100%. For example, the Spring/Diaphragm type as seen at 2:31 of the video is typically throttled by a pneumatic signal from 3 to 15 psi.
Please video about vacuum feeders silo feeders
Thanks for your topic suggestion, Mohamed! I will happily pass this on to our course developers.
Happy learning!
Sir please guides which software u are using for animation for all components please share details
Hi Kishan,
Thanks for your comment! I am actually not sure about that, as this is created by our animation and graphic department.
Thanks alot.
*Iraq*
You are welcome!
Glad to see Iraqi people here!
@@mohammedalbayati6617 Me too, *gentleman*
4:07 you have mistake. Right valve supposed to be Air-to-open but the spring is in the wrong place. It should be at the top.
Hi there,
Thank you for your comment! Yes, you are correct. Thanks for pointing that out. On rare occasions, we miss something in our animation review.
RealPars !! Can you mae a video on CCTV ?
Hi Mohammed!
Thanks for your message and your suggestion. I will pass this on to our course developers!
Thanks for sharing and happy learning!
@@realpars You're Welcome 🙂
PLC Wiring Video please Sir
Thanks for the suggestion!
❤️
I don't think pneumatics is that much different from hydraulics, correct?
Hi @rzqmina. I certainly don't consider myself to be a hydraulic expert but I agree with you. There are very many similarities.