Compressor loud „wooosh“ at end of charging

Daniel29

Member
Joined
May 10, 2012
Messages
51
Location
Germany
I have two compressor for working with my Airgraver. One is a small Sil Air 20A for working in my home workshop and a bigger 50/24 is used in my official workshop. My problem is not the noise of the charging process. What annoys me is the suddenly noise at the end of the charging. It makes a very loud wooosh when the compressor is filled. And since i am (as we all) working very focused this sound always gives me a scare jump at the bench.

I am pretty sure that it is necessary to release the excessive preassure at the end of the charging process. But its just annoyin.

On the small 20A there was a hose leading outside of the compressor. I wrapped a cloth around the end of that hose and pushed it in a cup. that way the excessive air can still be released but it is very silent now and it took the peak out of the sound. Attached is a image of my „silencer“.
Unfortunally there is no such hose on the 50/24 and i dont know how to silence it.

Has anyone had the same issues with the compressor and maybe a solution? Putting the compressor in another room is not possible.
 

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mitch

~ Elite 1000 Member ~
Joined
Jul 23, 2007
Messages
2,635
it's bleeding pressure against the switch valve so it doesn't have to overcome that to reopen for the next cycle. what you can do about it depends on a lot on the switch design. some have a threaded port that can be routed into a muffler (various types & sizes available from pneumatic suppliers), but for some of the simpler ones you're pretty much stuck wrapping a towel around the switch housing. you could replace the switch to one with a port. they usually run about $50.
 

Daniel29

Member
Joined
May 10, 2012
Messages
51
Location
Germany
Thank you Mitch!

I try to find out which design the switch is. Even if i need to invest in that 50$ part, as long as i get rid of that startling noise it is worth it.
 

monk

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Feb 11, 2007
Messages
10,857
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washington, pa
i have 4 compressors. 3 small, i large. all are silent xcept the 7.5hp. when the unloader valve opens on it , it's kinda very noisy. but the nature of the work i do with the big one, uh, i just ignor it. fortunately, it's located in my outside workshop.
 

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