How Unloader Works in Main Air Compressor ? Full Explanation | Important for MMD Orals
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- เผยแพร่เมื่อ 22 ก.ค. 2024
- Hey Guys, Please find the Detailed Explanation of Main Air Compressor Unloader Valve. Watch this video full. Suggestions are highly Welcome.
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ıts so competence and skıllfull descrıbıng of a coolıng valve explanatıon !!😁😇
Im currently preparing for my oral assessment for 4th Engr. your videos are very helpful. thank you so much
Thanks alot..kindly share and spread this Channel to maximum
Very, very good explanation. Thank you very much 😊
Very good and precise explanation. Appreciate your great effort.
One observation though.
Normally I have seen unloader solenoids are normally close types. Means the plunger will be pushed down normally if there is no electric signal so that unloader itself is always kept in open position while starting and stopping no matter if there is electric signal or not.
Okay..Thanks alot..😊😊😊
Thank you very much! The best explanation i’ve ever seen!
That's wonderful. thanks for your valuable feedback.😊😊
Well done, iam a sailing 4th and u have explained it very effectively bro.
Glad it helped
The best video on TH-cam.. Finally understood the concept .. Thanks a lot 🎉
Thanks alot for your response 😊
Very nice and good explanation sir .keep in rock🔥🔥
Just saw your channel for the uploader.I must say this is very impressive.Thank you for sharing
Thank you so much Stephen ukpong for your interest in the channel.
😊👍
Fantastic, beautifully done. Thank you very much. Love your channel.
Thanks alot
Effective teaching 👏 I’ve been benefiting from your videos prior to an interview
Wow..thats wonderful
Excellent explanation, all your videos are fabulous..keep up the good work!!
Glad you like them!
Thank you sir for the clear and detailed explanation. Subscribed!
Thanks for the sub!
Wow!
Very nice.
excellent explanation
excellent video. thank you.
Thanks Sambit dash.😊👍
Best explanation so far!! 👌👌
Glad it was helpful!
Effective teaching 👏 May Allah bless you ❤❤❤
Thanks a million
In the normal condition, the pin holes connected to the cooler drain are in open condition right?, And when the solenoid valve is activated, the pressure imbalance and 2 valves lift and releases the LP,HP side air pressure.
If the pin holes connected to the cooler drain are in open condition ,then also LP and HP air pressures will drain right since both cooler drains(O1,O2) and X,Y connected to air side/pipe ( Correct me if i am wrong ). Then why there is seperate valves for X and Y ?
Thanks a lot for this sir..!
Most Welcome Karun Monnappa..👍👍
Real effort, respect bro.
Thanks alot adilkhan
Well explained 👍
Thank you so much Aniket
Does the 1st stage or 2nd stage air cooler drain stay open during normal running of compressor
Appreciate the effort. Bit more clarification needed
Thanks
thanks for the explaination sir!! as there is no single explaination regarding unloader on yt but you saved us. you have gained one more subscriber.
i have one doubt. as you mentioned compressor is driven by 3 phase induction motor so which motor is used on ship for fuel oil and lube oil handling? also which motor is used to run centrifugal pump on ship?
plz answer this. thank you.
Thank you so much Yash More for your keen interest in the channel and in this video. I create content which is not easily available or in books unlike just copying and pasting the content.
I will send the answers to your doubts soon regarding motors shortly.
@@CLASS4ORALS yes completely agreed.
Okay sir. I have an interview scheduled at the end of February. so it's my kind request to answer those questions as soon as possible.
Surely Will send.👍 till then please refer the Pump manuals of your respective ship, that contains the Type of motor used.
@@CLASS4ORALS sir I don't have sponsorship yet.
I have sponsorship interview scheduled at the end of month not MEO class IV interview.
Good job brother .. keep it up
Thank you so much
❤
Good effort bro
Thank you so much
Thank you all the efforts sir.😍
Plx let me download all the videos from your channel.
You may use Savefromnet website
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👍👍😊
very useful video
Thanks alot
great explanation sir
Thanks
Sir from the video , the air is drained in both the case ie during the solenoid valves actuation and also when it is not actuated , so to run the compressor so to actually compress air we need to disconnect the unloader??
Yes, during operation of Unloader initially for 10 sec, or after 20 min for 10 sec, now unloader needs to be deactivated. the Compressor is now under Compression mode.
Hence unloader is not actuated that time of general compression.
Also very tiny amount of air/water from Intercooler and aftercooler keeps on draining via Unloader, through the machined bore,(even if Unloader is not operational)
that draining is not going to affect the performance of compression much.
I hope that clears your doubt.
What about lifting of suction valve where can we see this mechabism
I didn't understand please make another video with very clear explanation.
Which part?
How come air pressure of 5bar(X) and 30bar(Y) is available to unloader during STARTING of compressor is??
If the compressor is not running, pressure would be zero only to unloader, isn't it?
Before starting, the pressure starts to build up, that time 5 bar and 30 bar production will act on unloader
Sorry sir, what kind or what model of unloader you are describing in this video? In my experience, the unloading process works only when the solenoid valve was not energized. It is during starting, every 15 mins of continuous running and while the compressor is not running or stop. While the compressor is running in normal operation, the solenoid valve was constantly energized and it pushes down the pilot valve to cover the tiny hole or opening as you describe. As the tiny openings are closed, the pilot air coming from first stage pushes and close the L.P. valve and pilot air from second stage closes the H.P. valve, Those were trapped and not continuously going to atmosphere to hold the valves in closed position. When the solenoid vave was not energized during unloading process. the pilot valve was push back by the spring to open the tiny opening. This tiny openings when open was use as a passage by the air closing the L.P. valve. When this air scapes, the L.P. Valve and H.P. Valve can now push upward by the drain coming form first and second stage. And then the valves are open for unloading process.
This is not a particular model or maker Unloader. This is what being taught to mt Seniors and in Academy. You r right the tiny holes are mostly trapped and not leaking to atmosphere, but some models do not completely trap holes..
Good observation 👍
i Had a simple question , when the compressor is working normal and the unloader is not in use still 5 bar air will go the drain via the internal grooved pipes ?
if the air taken at x is after the intercooler how is the pressure in the compressor unloaded?
Sir you said that unloader releases drain and the compressed air. Unloader is keep on releasing air or drain continuosly then how compression takes place.
The air and drain release quantity is infinitesimally small and negligible. CONSIDER it Next to NIL So it has no Major effect on Unloader operation.
Bro can you please make the video of Unloader for Refrigeration compressor too. This is too mmd question for eto
Okay.. so far I have not worked on that. I will try to make soon for that.keep watching. Thanks for your trust in channel
Just one correction, when the plungers are closing the orifices, the pressure above the LP and HP pistons are not 0 bar. They are at atmospheric pressure, which is almost equal to 1 bar.
Thanks for the deep observation 👍
If solenoid recieves electrical to open the onloader then why u open every time aircooler drain
Does this concept works for chiller system ?
I have made this for Air Compressors.
brother, how do i know my compressor unloader is working or not
You can see the low pressure on HP and LP gauge initially, if you see this and rising after 10 15 sec, then ur unloader is working good..if not, it is faulty
Why after every 20 minutes unloaded works for 10-15 seconds?
Because it is necessary for removal of any moisture accumulation in the compression chamber and in Intercooler and Aftercooler Drain, else it may cause difficulty in Effective compression.
Also risk of failure bcs Moisture and water is imcompressible.
Hence depending on maker, on an avg there is 10 seconds of unloading every 20 minutes of compression.
@@CLASS4ORALS but moisture is already draining through the pin hole then what is the need to drain again every 20 mins
@@CLASS4ORALS and the x and Y ports r not connected to the cooler drains then how will they drain the moisture?
TIA (:
Sir please hindi main video dijie na🙏
Video worldwide dekhte h sab isliye Hindi mein sab nhi samajh payenge
can u speak me what is x and y?
Watch full video